One of the lightest smartphones on the market today weighs 113 g. To protect your phone, you may want to use a screen protector, which weighs 27.2 g, and a heavy duty phone case, which weighs 114 g. What is the total weight of the phone, screen protector, and case?

Answers

Answer 1

Answer:

154.2g

Step-by-step explanation:

This is quite straightforward, what we need to add the masses together.

113g + 114g + 27.2g = 154.2g

Answer 2
Final answer:

The total weight of the smartphone, screen protector, and heavy duty phone case is 254.2 grams.

Explanation:

Given that the smartphone weighs 113 g, the screen protector weighs 27.2 g, and the heavy duty phone case weighs 114 g, the total weight (in gram) of the phone, screen protector, and case would simply be the sum of these weights. In this case, we take 113 g + 27.2 g + 114 g which results in 254.2 g as the total weight. Therefore, if you use both a screen protector and a heavy duty case to protect your phone, the total weight would be 254.2 g.

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Related Questions

Identify the conic that is formed by the intersection of the plane described and the double-napped cone.

The plane intersects both nappes and does not pass through the vertex.
What is the conic section formed?

Circle


Hyperbola


Ellipse


Parabola

Answers

Answer: B) hyperbola

If the cutting plane was parallel to the circular base of the cones, then we would have a circular cross section (assuming the plane doesnt cut through the vertex). However, we're told than the plane intersects both nappes, or cones, so it's not possible for the plane to be parallel to the base faces. We can rule out choice A.

We can rule out choice C and choice D for similar reasons. An ellipse only forms if the plane only cuts through one cone only, which is the same story for a parabola as well.

A mixture weighing 600kg has two ingredients: sand, cement and stones. There is twice as much cement as sand and three times as much stones as sand. How much cement in the mixture?

Answers

Answer:

Step-by-step explanation:

All the masses here are based on the main mass of the sand.  So we will call sand "x".  If there is two times as much cement as sand, then cement is 2x; if there is three times as much stone as sand, then stone is 3x.  All of these added together equal a mass of 600 kg:

x + 2x + 3x = 600 so

6x = 600 and

x = 100 kg

There are 100 kg of sand.  That means that there is 200 kg of cement and 300 kg of stone

Answer:

200 kg

Step-by-step explanation:

Total weight of the mixture = 600kg

Let the weight of the cement in the mixture be x kg.

According to the problem statement, there is twice as much cement as sand, therefore the weight of sand relative to cement will be 1/2, i.e.

sand weight = 1/2x =0.5x

Similarly, weight of stone will be three times as much as sand.

Meaning, stone weight = 3*0.5x=1.5x

Total weight of all the components will be

cement weight + sand weight  + stone weight  =

x + 0.5x + 1.5x = 3x

But 3x = 600,

x = 600/3= 200 kg

In a recent study on world​ happiness, participants were asked to evaluate their current lives on a scale from 0 to​ 10, where 0 represents the worst possible life and 10 represents the best possible life. The mean response was 5.9 with a standard deviation of 2.2.


​(a) What response represents the 92nd ​percentile? ​

(b) What response represents the 62nd ​percentile?

​(c) What response represents the first ​quartile?

Answers

Answer:

a) A response of 8.9 represents the 92nd ​percentile.

b) A response of 6.6 represents the 62nd ​percentile.

c) A response of 4.4 represents the first ​quartile.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 5.9

Standard Deviation, σ = 2.2

We assume that the distribution of response is a bell shaped distribution that is a normal distribution.

Formula:

[tex]z_{score} = \displaystyle\frac{x-\mu}{\sigma}[/tex]

a) We have to find the value of x such that the probability is 0.92

P(X < x)  

[tex]P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.92[/tex]

Calculation the value from standard normal z table, we have,  

[tex]P(z<1.405) = 0.92[/tex]

[tex]\displaystyle\frac{x - 5.9}{2.2} = 1.405\\x = 8.991 \approx 8.9[/tex]

A response of 8.9 represents the 92nd ​percentile.

b) We have to find the value of x such that the probability is 0.62

P(X < x)  

[tex]P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.62[/tex]

Calculation the value from standard normal z table, we have,  

[tex]P(z<0.305) = 0.92[/tex]

[tex]\displaystyle\frac{x - 5.9}{2.2} = 0.305\\x = 6.571 \approx 6.6[/tex]

A response of 6.6 represents the 62nd ​percentile.

c) We have to find the value of x such that the probability is 0.25

P(X < x)  

[tex]P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.25[/tex]

Calculation the value from standard normal z table, we have,  

[tex]P(z<0.305) = -0.674[/tex]

[tex]\displaystyle\frac{x - 5.9}{2.2} = -0.674\\x = 4.4172 \approx 4.4[/tex]

A response of 4.4 represents the first ​quartile.

In the Parallelogram below, x = ?

Answers

Answer:

12

Step-by-step explanation:

3x + 7 = 5x - 17

5x - 3x = 7 + 17

2x = 24

x = 12

How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?

Answers

Answer:

Only one.

Step-by-step explanation:

Given that there are 25 cookie of the same type in a cookie jar.

We have to select 4 cookies from these 25.

Since they are all the same type, they are identical.

The question is

How many ways can you choose 4 cookies from a cookie jar containing 25 cookies of all the same type?

There is no difference if we take any four cookies from these 25.

Hence no of different ways = 1

Only one is the answer.

Answer:

Step-by-step explanation:

25 P4=25×24×23×22=303600

One line of text on a page uses about 4/15 of an inch. There are 0.5-inch margins at the top and bottom of a page. Write and solve an inequality to find the number of lines that can be typed on a page that is 17 inches long.

Answers

Answer:

60 lines can be typed in the page

Step-by-step explanation:

Given:

Length of the page  = 17 inches

Length of the margin = 0.5-inch

length of one line  = 4/15

To Find:

The number of lines that can be typed on a page

Solution:

Let the number of line  that can be typed be  n

then

n <= [tex]n \leq \frac{\text { total length of the page}-\text {top margin} - \text{ bottom margin}}{\text{size of each line }}[/tex]

the top and bottom margins are 0.5 inches each

so we will be having

=> [tex]n \leq \frac{17 -0.5-0.5}{\frac{4}{15}}[/tex]

=>[tex]n \leq \frac{16}{\frac{4}{15}}[/tex]

=>[tex]n \leq \frac{16\times 15}{4}[/tex]

=>[tex]n \leq\frac{240}{4}[/tex]

=> [tex]n \leq 60[/tex]

A pair of boots and a pair of tennis shoes cost $196.12. The difference in their cost is $44.38. Determine the cost of each type of footwear Write and solve using system of equations

Answers

Answer: A pair of boots costs $120.25. A pair of tennis shoes costs $75.87✔️

Step-by-step explanation:

Let B the cost of a pair of boots and let T the cost of a pair of tennis shoes.

Then we know:

A pair of boots and a pair of tennis shoes cost $196.12:

B + T = $196.12 } Equation 1

We also know:

The difference in their cost is $44.38:

B - T = $44.38 } Equation 2

From the equation 1 we know T:

T = $196.12 - B

Now we can substitute this value in equation 2:

B - ($196.12 - B) = $44.38

B - $196.12 + B = $44.38

2B = $44.38 + $196.12 = $240.5

B = $240.5/2 = $120.25◄cost of a pair of boots

Since we know the value of T from the equation 1:

T = $196.12 - B = $196.12 - $120.25 = $75.87◄cost of a pair of tennis shoes

Answer: A pair of boots costs $120.25. A pair of tennis shoes costs $75.87✔️

Verify

We can substitute these values in equations 1 and 2 and check the results:

B + T = $196.12 } Equation 1

$120.25 + $75.87 = 196.12 ✔️check!

B - T = $44.38 } Equation 2

$120.25 - $75.87 = $44.38 ✔️check!

Spymore

The cost of a pair of boots is $120.25 and the cost of a pair of tennis shoes is $75.87.

What is a linear system of equations?

A system of linear equations consists of two or more equations made up of two or more variables such that all equations in the system are considered simultaneously. The solution to a system of linear equations in two variables is any ordered pair that satisfies each equation independently.

Given that, a pair of boots and a pair of tennis shoes cost $196.12.

Let the cost of a pair of boots be b and the cost of a pair of tennis shoes be t.

Now, b+t=196.12 --------(I)

The difference in their cost is $44.38.

b-t=44.38 --------(II)

Add equation (I) and (II), we get

b+t+b-t=196.12+44.38

2b=240.5

b=240.5/2

b=$120.25

Substitute b=$120.25 in equation (I), we get

b+t=196.12

t=196.12-120.25

t=$75.87

Therefore, the cost of a pair of boots is $120.25 and the cost of a pair of tennis shoes is $75.87.

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A set of observations on a variable measured at successive points in time or over successive periods of time constitute aa. geometric series.

b. time invariant set.c. time series.

d. logarithmic series.

Answers

You’re answer is B love!

Answer:

time series

Step-by-step explanation:

A time series is a sequence of observations on a variable measured at successive points in time or over successive periods of time.

3 cards are drawn from a standard deck without replacement. What is the probability that at least one of the cards drawn is a red card?

Answers

Answer: [tex]\dfrac{15}{17}[/tex]

Step-by-step explanation:

Total number of cards in a deck = 52

Number of red cards = 26

Number of cards not red =

Number of ways to draw not red cards = [tex]^{26}C_3[/tex]

Total ways to draw 3 cards = [tex]^{52}C_3[/tex]

The probability that none of three cards are red = [tex]\dfrac{^{26}C_3}{^{52}C_3}[/tex]

[tex]=\dfrac{\dfrac{26!}{3!(26-3)!}}{\dfrac{52!}{3!(52-3)!}}[/tex]  [∵ [tex]^nC_r=\dfrac{n!}{r!(n-r)!}[/tex]]

[tex]=\dfrac{\dfrac{26\times25\times24\times23!}{(23)!}}{\dfrac{52\times51\times50\times49!}{3!(49)!}}=\dfrac{2}{17}[/tex]

Now , the probability that at least one of the cards drawn is a red card = 1- Probability that none cards are red

[tex]=1-\dfrac{2}{17}=\dfrac{17-2}{17}=\dfrac{15}{17}[/tex]

Hence, the required probability = [tex]\dfrac{15}{17}[/tex]

Need help with please show me how to get the answer

Answers

Answer:

  ? = 47°

Step-by-step explanation:

The angle marked B at the intersection of the secants is half the difference of the arcs they intercept.

  ∠B = (DE -AC)/2 = (142° -48°)/2 = 47°

The unknown angle is 47°.

What is the area of the shaded portion of the circle?

(5π – 11.6) ft2
(5π – 5.8) ft2
(25π – 11.6) ft2
(25π – 5.8) ft2

Answers

Answer:

The first option is the correct one, the area of the shaded portion of the circle is

[/tex](5 \pi -11.6)ft^2[/tex]

Step-by-step explanation:

Let us first consider the triangle + the shadow.

The full area of the circle is the radius squared times pi, so

A=[tex](5 ft)^2 \cdot \pi \\25 ft^2 \cdot \pi[/tex]

Since [tex]\frac{72^{\circ}}{360^{\circ}}=\frac{1}{5}[/tex], the area of the triangle + the shaded area is one fifth of the area of the whole circle, thus

[tex]A_1=\frac{1}{5}25 ft^2 \cdot \pi\\ =5 ft^2 \cdot \pi[/tex]

If we want to know the area of the shaded part of the circle, we must subtract the area of the triangle from [tex]A_1[/tex].

The area of the triangle is given by

[tex]A_{triangle}=\frac{1}{2}\cdot (2.9+2.9)ft \cdot 4 ft\\= 11.6 ft^2[/tex]

Thus the area of the shaded portion of the circle is

[tex]A_1-A_{triangle}=5 \pi ft^2-11.6ft^2\\= (5 \pi -11.6)ft^2[/tex]

Answer:

A

Step-by-step explanation: i did the test and review

Question 8 options:
The graph of the line below has a slope of 34, and a y-intercept of 8.

Find the values of A and C

Answers

Answer:

Step-by-step explanation:

Based on what you have here as the slope we can set the slope formula equal to 34 using the points (0, 8) and (8, c) to solve for c, then use the points (0, 8) and (a, 5) to solve for a.  

c first:

[tex]\frac{c-8}{8-0}=34[/tex] and

[tex]\frac{c-8}{8}=34[/tex] and

c - 8 = 272 s0

c = 280

For a:

[tex]\frac{5-8}{a-0}=34[/tex] and

[tex]\frac{-3}{a}=34[/tex] and

-34a = 3 so

[tex]a=-\frac{3}{34}[/tex]

That seems a little weird, but when you plug those points into the slope formula to solve for the slope, it works out the way it should.

Which explicit rule represents the following arithmetic sequence: 7, 11, 15, 19, 23,...
1. an=3+4n
2. an=7+4n
3. an= 4+7n
4. an=7x4^n-1

Answers

。☆✼★ ━━━━━━━━━━━━━━  ☾

The correct option would be A. an = 3 + 4n

You may test my substituting values in:

3 + 4(1) = 7

3 + 4(2) = 11

etc

Have A Nice Day ❤  

Stay Brainly! ヅ  

- Ally ✧  

。☆✼★ ━━━━━━━━━━━━━━  ☾

Answer:

a

Step-by-step explanation:

Solve the equation by factoring: x^2 + 13x = -42

Answers

x^2+13x=-42
x^2+13x+42=0
(x+6)(x+7)=0
X=-6,-7

Answer:

-6 and -7 are the roots

Step-by-step explanation:

The quadratic equation given is:

[tex]x^{2}+13x=-42\\Taking\ -42\ to\ left\ hand\ side\ we\ get\\x^{2} +13x+42=0[/tex]

We can factorise the equation as:

[tex]x^{2}+6x+7x+42=0\\(x^{2}+6x)+(7x+42)=0\\[/tex]

Taking x common from the first bracket and 7 common from the second bracket we get:

[tex]x(x+6)+7(x+6)[/tex]

Taking (x+6) common from both terms we get:

[tex](x+6)(x+7)=0[/tex]

x= -6 or x=-7

Hence -6 and -7 are the roots of the given quadratic equation.

Liam uses 2 quarts of yellow paint and adds 3 1/4 Jars of blue paint.Evan uses 1/2 quarts of yellow paint and adds 5 1/2 of red paint.They end up with the same volume of paint.write an equation to show it.

Answers

Answer:

2 + (13/4)x = 1/2 + (11/2)y

Step-by-step explanation:

Let each jar of paint used by Liam be x

Let each jar of paint used by Evan be y.

Liam uses 2 quarts of yellow paints and adds 3 1/4 jars of blue paint. so we have

2 + 3 1/4x

= 2 + (13/4)x

Since Evan also uses 1/2 quarts of yellow paints and add 5 1/2 jar of red paint, we have

1/2 + 5 1/2y

= 1/2 + (11/2)y

Since they end up with the same volume of paint, we have

2 + (13/4)x = 1/2 + (11/2)y

Final answer:

The equation to show that Liam and Evan end up with the same volume of paint, considering all quantities are in quarts, is 2 + 3.25 = 0.5 + 5.5.

Explanation:

To solve the problem where Liam and Evan end up with the same volume of paint, we can write an equation that sets the total volume of paint used by each person equal to each other. Since Liam uses 2 quarts of yellow paint and adds 3 1/4 (which is equivalent to 3.25) jars of blue paint and Evan uses 1/2 quart of yellow paint and adds 5 1/2 (equal to 5.5) jars of red paint, the equation comparing their total amounts of paint in quarts can be written as:

2 + 3.25 = 0.5 + 5.5

Before writing this equation, we need to ensure that both expressions represent quantities in the same unit. We confirm that all the amounts are given in quarts, so there is no need to convert units in this case. The equation illustrates that the total volume of paint used by Liam and Evan is equal.

HELP ASAPPPPP

Given that 6 > –2, which statements are true? Check all that apply.

(2)(6) > (–2)(2)

6/2 < -2/2

(–2)(6) > (–2)(–2)

6/-2 < -2/-2

(2)(6) < (–2)(2)

6/2 > -2/2

Answers

Answer:

The Statements which are true are:

(2)(6) > (–2)(2)

6/-2 < -2/-2

6/2 > -2/2

Step-by-step explanation:

Given:

6 > –2

We need to check all options which are true,

Hence we will check for all 1 by 1.

(2)(6) > (–2)(2)

It means that when 2 is multiplied on both side we get the value as

12 > -4

Since 12 is greater than -4.

Hence this statement is true.

6/2 < -2/2

It means that when 2 is divided on both side we get the value as

3 < -1

Since 3 is greater than -1.

Hence this statement is false.

(–2)(6) > (–2)(–2)

It means that when -2 is multiplied on both side we get the value as

-12 > 4

Since -12 is less than 4.

Hence this statement is false.

6/-2 < -2/-2

It means that when -2 is divided on both side we get the value as

-3 < 1

Since -3 is lesser than 1.

Hence this statement is true.

5) (2)(6) < (–2)(2)

It means that when 2 is multiplied on both side we get the value as

12 < -4

Since 12 is greater than -4.

Hence this statement is False.

6/2 > -2/2

It means that when 2 is divided on both side we get the value as

3 > -1

Since 3 is greater than -1.

Hence this statement is True.

Answer:

A,D,F

Step-by-step explanation:

I got these correct!

A manufacturing process produces a critical part of average length 120 ​millimeters, with a standard deviation of 3 millimeters. All parts deviating by more than 5 millimeters from the mean must be rejected. What percentage of the parts must be​ rejected, on​ average? Assume a normal distribution.

Answers

Answer:

9.692%

Step-by-step explanation:

We have been given that a manufacturing process produces a critical part of average length 120 ​millimeters, with a standard deviation of 3 millimeters. All parts deviating by more than 5 millimeters from the mean must be rejected.

5 millimeters below mean would be [tex]115[/tex] and 5 millimeters above mean would be [tex]125[/tex].

Corresponding z values for 115 and 125 would be:

[tex]z=\frac{x-\mu}{\sigma}[/tex]

[tex]z=\frac{115-120}{3}[/tex]

[tex]z=\frac{-5}{3}[/tex]

[tex]z=-\frac{5}{3}[/tex]

[tex]z=\frac{125-120}{3}[/tex]

[tex]z=\frac{5}{3}[/tex]

Now, we need to find [tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})[/tex] using normal distribution table.

[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=P(z<-1.66)+P(z>1.66)[/tex]

We know that [tex]P(z>1.66)=1-P(z<1.66)[/tex].

[tex]P(z>1.66)=1-0.95154 [/tex]

[tex]P(z>1.66)=0.04846[/tex]

[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=0.04846+0.04846[/tex]

[tex]P(z<-\frac{5}{3})+P(z>\frac{5}{3})=0.09692[/tex]

Now, we need to convert 0.09692 into percentage as:

[tex]0.09692\times 100\%=9.692\%[/tex]

Therefore, 9.692% of parts must be​ rejected on​ average.

About 0% of the parts would be​ rejected, on​ average.

Z score

The z score is used to determine by how many standard deviations the raw score is above or below the mean. It is given by:

z = (x - μ) / σ

where μ is the mean, x = raw score and σ is the standard deviation.

Given μ = 120, σ = 3. For z > 5:

P(z > 5) = 1 - P(z < -38.3) = 1 - 1 = 1 = 0%

About 0% of the parts would be​ rejected, on​ average.

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Drag each tile to the correct location on the table. Each tile can be used more than once, but not all tiles will be used.
Choose the justification for each step in the solution to the given equation.

Answers

Answer:

The answer to your question is below

Step-by-step explanation:

1)  Given

2)  Subtraction property of equality (because we are subtracting the same quantity on both sides).

3) Simplification

4) Subtraction property of equality ( because we are subtracting the same quantity on both sides).

5) Simplification

6) Multiplication property of equality (because we are multiplying the same quantity on both sides).

7) Simplification

A researcher for an airline interviews all of the passengers on five randomly selected flights.
Identify which sampling technique is used.

a. Stratified.
b. Convenience.
c. Cluster.
d. Random

Answers

Answer

Cluster sampling. See explanation below.

Step-by-step explanation:

For this case they not use random sampling since we are selecting people from flights. Because we select just 5 random flights.

Is not stratified sampling since we don't have strata clearly defined on this case, and other important thing is that in order to apply this method we need homogeneous strata groups and that's not satisfied on this case.

Is not convenience sampling because they NOT use a non probability method in order to select the people from the flights.

So then the only possible method is cluster sampling since we have clusters clearly defined (Passengers from the airlines), and we satisfy the condition of homogeneous characteristics on the clusters and an equal chance of being a part of the sample, since we are selecting RANDOMLY, the 5 flights to take the information.

Last year, a bakery sold w loaves of bread. This year, the bakery sold three more than twice the number of loaves of bread sold last year. If next year the bakery plans on selling twice the number of loaves of bread sold this year, how many loaves of bread does the bakery expect to sell next year?

Answers

Answer:

Bakery will sell  [tex]4w+6[/tex] loaves of bread next year.

Step-by-step explanation:

Given:

Number of loaves of bread sold last year = 'w'

Now Given:

This year, the bakery sold three more than twice the number of loaves of bread sold last year.

Framing in equation form we get

Number of loaves of bread sold this year = [tex]2w+3[/tex]

Also Given:

next year the bakery plans on selling twice the number of loaves of bread sold this year.

framing in equation form we get;

Number of loaves of bread bakery will sell next year = [tex]2(2w+3) = 4w+6[/tex]

Hence Bakery will sell  [tex]4w+6[/tex] loaves of bread next year.

The bakery expects to sell  4w + 6  loaves of bread next year.

Let's break down the problem step by step:

1. Number of loaves sold this year:

  - Last year, the bakery sold  w  loaves of bread.

  - This year, the bakery sold three more than twice the number of loaves sold last year.

  - Therefore, the number of loaves sold this year is:

   [tex]\[ 2w + 3 \][/tex]

2. Number of loaves expected to be sold next year:

  - Next year, the bakery plans to sell twice the number of loaves sold this year.

  - Therefore, the number of loaves expected to be sold next year is:

   [tex]\[ 2 \times (2w + 3) \][/tex]

3. Simplify the expression:

  - Distribute the 2 in the expression:

  [tex]\[ 2 \times (2w + 3) = 2 \times 2w + 2 \times 3 = 4w + 6 \][/tex]

Therefore, the bakery expects to sell  4w + 6  loaves of bread next year.

An investor just purchased a rectangular 2-acre retail lot for $250 a frontage foot. If she paid $100,000 total, what was the depth of the lot?
a. 400’ b. 250 c. 871’ d. 218’

Answers

Answer:

[tex] Depth = \frac{Area}{# frontage feet}= \frac{87120 ft^2}{400}=217.8 \approx 218[/tex]

So for this case the best answer would be:

d. 218’

Step-by-step explanation:

Previous concepts

Foot front : "Is a foot measured along the front of a piece of property".

Solution to the problem

For this case we need to begin finding the number of frontage feet, with the following formula:

[tex]Frontage fronts=\frac{Amount paid}{Unitary price}[/tex]

And for this case if we replace the values given we got:

[tex]Frontage fronts=\frac{100000}{250}=400 fromtage foot[/tex]

Now we need to convert the area to square feet. And we know that:

[tex] 1 acre= 43560 ft^2[/tex]

And converting we got: [tex]2 acre *\frac{43560 ft^2}{1 acre}=87120 ft^2[/tex]

Now we can divide the total area by the total of frontage feer and we got:

[tex] Depth = \frac{Area}{# frontage feet}= \frac{87120 ft^2}{400}=217.8 \approx 218[/tex]

So for this case the best answer would be:

d. 218’

Inez bought a package of wrapping paper and 4 bows. If she wrapped 4 identical gifts with the cost of the paper and bow, how much did it cost to wrap each gift

Answers

Answer: [tex]\$1.99[/tex]

Step-by-step explanation:

The missing figure is attached.

For this exercise you need to analize the information provided.

You can observe in the picture attached that the cost of a package of wrapping paper is $3.76 and each bow costs $1.05.

Since Inez bought 1 package of wrapping paper and 4 bows, you get that the total amount of money she spent was:

[tex]Total=\$3.76+4(\$1.05)\\\\Total=\$7.96[/tex]

According to the data given in the exercise, Inez wrapped 4 identical gifts.  So, let be "x" the cost for wrapping each gift.

This is:

[tex]x=\frac{\$7.96}{4}\\\\x=\$1.99[/tex]

1.99

Step-by-step explanation:

A.J. has 20 jobs that she must do in sequence, with the times required to do each of these jobs being independent random variables with mean 50 minutes and standard deviation 10 minutes. M.J. has 20 jobs that he must do in sequence, with the times required to do each of these jobs being independent independent random variables with mean 52 minutes and standard deviation 15 minutes.
(a) Find the probability that A.J. finishes in less than 900 minutes.
(b) Find the probability that M.J. finishes in less than 900 minutes.
(c) Find the probability that A.J. finishes before M.J.

Answers

Final answer:

To find the probability that A.J. and M.J. finish their jobs within a certain time, we need to calculate the z-score for the given values and use a standard normal distribution table or a calculator to find the probability.

Explanation:

(a) To find the probability that A.J. finishes in less than 900 minutes, we need to calculate the z-score (standard score) for the value 900 using the formula: z = (x - mean) / standard deviation. In this case, x = 900, mean = 50 minutes, and standard deviation = 10 minutes. Once we have the z-score, we can use a standard normal distribution table or a calculator to find the probability.

(b) To find the probability that M.J. finishes in less than 900 minutes, we use a similar process as in part (a), but with different mean and standard deviation values. In this case, x = 900, mean = 52 minutes, and standard deviation = 15 minutes.

(c) To find the probability that A.J. finishes before M.J., we can compare the means of the two distributions. Since A.J.'s mean is lower than M.J.'s mean, the probability of A.J. finishing before M.J. is higher.

An aircraft carrier made a trip. The trip there took 5 hours and the trip back took 6 hours. It averaged 3 mph faster on the trip there then on the return trip. Find the aircraft carriers speed on the outbound trip.

Answers

Answer: The outbound trip is 18 miles per hour

Step-by-step explanation:

Let x represent the speed of the plane.

An aircraft carrier made a trip. Let us assume that this trip was outbound. The trip there took 5 hours.

Distance = speed × time. Therefore

Distance = 5x

The trip back took 6 hours. It averaged 3 mph faster on the trip there then on the return trip. This means that the speed on the trip back is x - 3 mph.

Distance = 6(x-3) = 6x - 18

Since the distance is the same,

5x = 6x - 18

6x - 5x = 18

x = 18

The speed on return or inbound trip would be 18 - 3 = 15 mph

After collecting eggs from his chickens, Dale puts the eggs into cartons to sell. Dale fills 151515 cartons and has 777 eggs left over. Each carton holds 121212 eggs. How many eggs did Dale collect?

Answers

Answer:

187 eggs

Step-by-step explanation:

Correct Question:

After collecting eggs from his chickens, Dale puts the eggs into cartons to sell. Dale fills 15 cartons and has 7 eggs left over. Each carton holds 12 eggs. How many eggs did Dale collect?

Dale filled up each carton with 12 eggs (that's the full capacity.

Dale filled up 15 full cartons.

So, the eggs he collected in carton:

15 * 12 = 180 eggs

He still had 7 left over, so total number of eggs that Dale collected is:

180 + 7 = 187 eggs

Hector spent $36.75 for 2 dvds that cost the same amount.The sales tax was $2.15.Hector also used a coupon for $1.00 of his purchase. How much did each dvd cost.

Answers

Answer:

Each DVD cost for Hector at $17.80.

Step-by-step explanation:

Total Money Spent = $36.75

Number of DVD to buy = 2

Sales tax = $2.15

Amount of Coupon to be used = $1.00

We need to find the cost of each DVD.

Let the Cost of each DVD be 'x'.

Now We can say that Total Money spent on DVD's is equal to Number of DVD to buy multiplied by Cost of each DVD plus Sales Tax minus Amount Coupon used.

Framing in equation form we get;

[tex]2x+2.15-1=36.75[/tex]

Solving the equation to find the value of x we get;

[tex]2x+1.15=36.75\\\\2x=36.75-1.15\\\\2x= 35.6\\\\x=\frac{35.6}{2}= \$17.8[/tex]

Hence Each DVD cost for Hector at $17.80.

A researcher interested in language development obtains a sample of 25 three-year-old girls and a sample of 25 three-year-old boys. Each child is given a vocabulary test and the researcher computes the mean score for each sample. The difference between the two sample means is an example of a
a. statistic
b. variable
c. constant
d. parameter

Answers

Answer:

(a) statistic

Step-by-step explanation:

The researcher conducted the research using sample space of 25 three-year-old girls and 25 three-year-old boys. This sample space is subjected to test with an expected outcome. The test allows the research to perform analysis on the event base on data he has collected. The collection, analysis and interpretation of data is called statistics.

Myriah wants to use dimensional analysis to find out how many centimeters (cm) are in 1.4 meters (m). Which of these equalities will be useful for this calculation?

Answers

Answer:

Option (4) is the answer.

Step-by-step explanation:

The given question is without options ; here is the complete question.

Myriah wants to use dimensional analysis to find out how many centimeters (cm) are in 1.4 meters (m). Which of these equalities will be useful for this calculation?

2.54 cm = 1 in.

1 m = 39.37 in.

1 cm = 10 mm

100 cm = 1 m

During the dimensional analysis Myriah wants to convert the dimension from meter to centimeter.

Option (1), In this option given equality is to convert centimeter to inch. which is not required.

Option (2), In this option equality is to convert meter to inch which is not required.

Option (3) the equality given will convert cm to mm, which is not required.

Option (4) equality given in this option will convert meter to centimeter which is the required equality.

Therefore, Option (4) will be the answer.

Which Of the following represnt the range of the function y=-1/2(x+10)^2+14?
1) y>=-5 2)y>=10 3) y<=7 4) y<=14, Explain plz

Answers

Answer:

The answer is option is (4) y ≤ 14

Step-by-step explanation:

The given function, y = - 0.5[tex](x + 10)^{2} + 14[/tex]

We have to find the range of this function. If we take the first part of the function alone we can see that it is always negative or zero. So the maximum value of the function is 14.

This happens when we make the first part zero and for that we put x = -10.

So the maximum value of the function occurs at x = -10 and that value is y = 14.

Hence the range is y ≤ 14.

The answer is option is (4) y ≤ 14

You go out to eat and your bill comes to $123. The GST is 5% and you leave a 15%
tip. How much would it cost altogether?

Answers

Final answer:

The total cost, including a 5% GST and a 15% tip on a bill of $123, would be $147.60, calculated by adding the GST and the tip amount to the original bill.

Explanation:

To calculate the total cost of the meal including tax and tip, we add both the Goods and Services Tax (GST) and the tip percentage to the original bill amount.

Calculate the GST by converting the percentage to a decimal and multiply by the bill amount: 0.05 × $123 = $6.15.Add the GST to the original bill: $123 + $6.15 = $129.15.Calculate the tip amount: Convert 15% to a decimal and multiply by the original bill amount: 0.15 × $123 = $18.45.Add the tip to the subtotal: $129.15 + $18.45 = $147.60.

The total cost, including a 5% GST and a 15% tip on a bill of $123, would be $147.60.

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