4 out of 5 students eat lunch in the cafeteria. How many of the 400 students would you expect to eat in the cafeteria? ( this has to deal with probability)

The required time that it takes for 90 miles is 1.5 hour.

The average speed is calculated for a period of time while instantaneous speed is calculated at certain instant of time. For instantaneous speed and average speed are equal for an object moving with constant speed.

The total distance is given as 240 miles.

And, the time taken is 4 hours.

Now, the speed can be calculated by taking the ratio of the distance and time as below,

Speed = Distance ÷ Time

⇒ Speed = 240 ÷ 4 = 60

Thus, the time taken to drive 90 miles is calculated as,

Time = Distance ÷ Speed

⇒ Time = 90 ÷ 60 = 1.5

Hence, the time taken to cover 90 miles is 1 hour.

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Answer:

True

Step-by-step explanation:

This is true. In a stratified random sample, the overall population is broken up into smaller groups by a certain factor that pertains to the survey they are conducting. They will then choose a simple random sample in each of these groups to determine who is going to be surveyed. Based on this, the definition is true.

Step-by-step explanation:

write it as a fraction.

Example:

What is the probability of drawing a diamond from a deck of cards?

?/4

1/4

I HOPE THIS WAS HELPFUL :-)

To calculate the probability of an event A when all outcomes in the sample space are equally likely, count the number of outcomes for event A and divide by the total number of outcomes in the sample space.

To calculate the probability of an event A when all outcomes in the sample space are equally likely, count the number of outcomes for event A and divide by the total number of outcomes in the sample space. This is known as the theoretical probability of A.

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Answer:

choice a.) 4.67

Step-by-step explanation:

Using the Z-score table.

We have:

mean u = 40

standard deviation s  = 3

for X = 54

Z-score = Z = (X - u)/s  = (54 - 40)/3 = 14/3 = 4.6667

P(Z > 4.6667) = 0.000003   very close to 0

Answer:

≈419.4 cm.

Step-by-step explanation:

To solve this problem, you will need to set up an exponential graph as shown:

y= 40 ·[tex](1.6)^{x}[/tex]

The 40 represents the initial height of the tree, while (1.6) represents the annual growth rate. 'x' represents the amount of years elapsed.

We can simply solve this by substituting 5 for x:

y= 40· [tex](1.6)^{5}[/tex]

y ≈ 419.4 cm.

Answer:

2

Step-by-step explanation:

The mean is the average of the numbers. You find the mean by adding all of the number values then dividing by the amount of numbers.

0+1+2+3+4=10

There are 5 numbers so we divide by 5

10/5=2

The mean of the parking spots is 2.

Answer:

5 and 13

Step-by-step explanation: edge 2021

The alternate exterior angle can be identified by understanding the definition alternate exterior angles.

The alternate exterior angles with angle 11 are angle 13° and angle 5°.

Given:

The parallel line [tex]r\parallel s[/tex] and [tex]t\parallel u[/tex].

Refer the attached figure to understand the given statement.

The alternate exterior angles can be create by transversal intersecting two parallel lines. The alternate exterior angles lies opposite side of transversal and create the two pair line of alternate exterior angles.

As per the above definition alternate exterior angles, we notice in figure [tex]\angle 13[/tex] and [tex]\angle 5[/tex] are the exterior side of parallel lines  and opposite to exterior side of parallel lines.

Thus, the alternate exterior angles with angle 11 are angle 13° and angle 5°.

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Answer:

Answer is D

Step-by-step explanation:

Due to the pedalfer by the formation of the acid at the time when atmospheric and volcanic gases mix with water.

Pedalfer should be comprise of the  aluminum and iron oxides. It should be considered as the subdivision of the order of zonal soil that contains the wide range of soils where sesquioxides increase with respect to the silica at the time of forming the soil. Also it should be arise when the area is humid.

Therefore, we can conclude that the option d is correct.

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Answer:

m = 12.99

Step-by-step explanation:

cos30° = m/15

√3/2 = m/15

2m = 15√3

m = 15√3/2

m = 15·1.73/2

m = 25.95/2

m = 12.99

Sana maka tulong plss rate and love

Answer:

34

Step-by-step explanation:

I have none... But I remember being asked this question in class!

I hope I've helped! Please leave a thanks and vote!

Answer:

kilgore, 140 miles

Step-by-step explanation:

Kilgore drives farther than Julio with a difference of 27.5 miles. Julio drives 112.5 miles while Kilgore drives 140 miles.

To determine who drives farther, we need to calculate the distance driven by Julio and Kilgore.

Kilgore drives farther. The difference in the distance is 140 miles - 112.5 miles = 27.5 miles.

We have been given that in ΔIJK, the measure of ∠K=90°, KJ = 77, IK = 36, and JI = 85. We are asked to find the ratio that represents the cosine of angle I.

First of all, we will draw a right triangle as shown in the attachment.

We know that cosine relates adjacent side of right triangle with hypotenuse.

[tex]\text{cos}=\frac{\text{Adjacent}}{\text{Hypotenuse}}[/tex]

We can see that adjacent side to angle I is IK and hypotenuse is IJ.

[tex]\text{cos}(\angle I)=\frac{IK}{IJ}[/tex]

[tex]\text{cos}(\angle I)=\frac{36}{85}[/tex]

Therefore, the ratio of cosine of angle I is [tex]\frac{36}{85}[/tex].

Answer:

the ratio of cosine of angle I is 36/85.

Step-by-step explanation:

Answer:

1) y= 2x-4

2) y= 2/3 - 3

3) y=1/2x+2

4) y=-4x-4

Step-by-step explanation:

all you basically has to do is is subtract the x to isolate the y and if the y and if the y still has a number by it you use it to decide it

Answer:

A. -4

Step-by-step explanation:

Set equations equal to each other.

2x+7=-1

Subtract 7 from both sides.

2x = -8

Divide both sides by 2.

x = -4

Answer:

The answer is D.

Step-by-step explanation:

The expression can be used to find the lateral area plus two bases of the cylinder is (D) 9[tex]\Pi[/tex] + 9[tex]\Pi[/tex] + 6[tex]\Pi[/tex](10) [tex]in^2[/tex] .

Mathematically, an expression is a combination of numbers, variables, operations, and functions that are combined according to specific rules to represent a mathematical computation or relationship. It can be thought of as a mathematical phrase or formula.

The sum of lateral area and the two bases of the cylinder

= lateral area + sum of the area of two bases.

The lateral area = 6[tex]\Pi[/tex](10) [tex]in^2[/tex].

So, The sum of the lateral area and the two bases of the cylinder

= 9[tex]\Pi[/tex] + 9[tex]\Pi[/tex] + 6[tex]\Pi[/tex](10) [tex]in^2[/tex].

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Answer:

50

Step-by-step explanation:

The probability of rolling an even number three times in a row is; 1/27.

It follows from the task content that the six sided die is rolled thrice.

On this note, upon rolling the dice thrice, it follows that the probability of rolling an even number all three times is;

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Answer:

9b^8 + 24b^3 = (3b^3) [ 3b^5  +  (8)]

greatest common monomial is  3*[tex]b^{3}[/tex]

Step-by-step explanation:

we see  9b^8 + 24b^3

there is a common factor here.

3b^3  so

9b^8 + 24b^3 = (3b^3) * 3b^5  +  (3b^3) *(8)

9b^8 + 24b^3 = (3b^3) [ 3b^5  +  (8)]

so...

Answer:

In option a, w < 10

in option b, w = 10 and 2(20) + 2(10) = 40 + 20 = 60 < 150

in option c, w > 10 but 2(60) + 2(20) = 120 + 40 = 160 > 150

In option d, w > 10 but 2(55) + 2(30) = 110 + 60 = 170 > 150

Therefore the corect answer is option b.

Step-by-step explanation:

Answer:

118.31

Step-by-step explanation:

because the circumference is 3.14 and you have to do 37. 68 x 3.14 and you get your answer

Answer:

the answer would be B.

Step-by-step explanation:

Study island I did this one

Answer:

pay  three 1 free

Step-by-step explanation:

If you pay 3 and get 1 free, you pay 75%, if you get 20% off you pay 80%. If you want to pay less, pay three and get 1 free

Answer:

I got 1/2

Step-by-step explanation:

Answer:

536.6

Step-by-step explanation:

First I found the area for the rectangles which is (15x10) multiplied by 3.

Then I found the area for the triangles which is A=(1/2)(8.66)(10). Which equals 43.3, then multiplied that by 2.

Add all the areas together (150)(3)+(43.3)(2)=536.6

Answer:

536.6

Step-by-step explanation:

it is a strange shape and that is the answer

Answer:

less than

Step-by-step explanation:

time is minutes and volume is already gallons and the 2 for gallons is at 4 minutes marking it 1 gallon per 2 minutes or half a gallon per minute

Answer:

A,B,C

Step-by-step explanation:

if it is wrong correct me

The correct options are Option A , Option B and Option C.

It is given that of total 15 children at the park, 12 children are riding bicycles and 3 children are riding scooters.

We have to find out that which ratio is correct from the given options.

What will the value of ratio ; 2 : 4 ?

The value will be 1 : 2.

Total number of children at the park = 15

Number of children riding bicycles = 12

Number of children riding scooters = 3

The ratio of bicycles to scooters will be ;

12 : 3

The ratio of scooters to total number of children will be ;

3 : 15

The ratio of bicycles to total number of children will be ;

12 : 15

Thus , the correct options are Option A , Option B and Option C.

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we have been given an expression [tex]\frac{\frac{2}{3}}{-4}-\left(\frac{1}{6}-\frac{8}{6}\right)[/tex]. We are asked to simplify our given expression.

Using quotient rule [tex]\frac{\frac{a}{b}}{c}=\frac{a}{bc}[/tex], we will get:

[tex]\frac{2}{3\cdot -4}-\left(\frac{1}{6}-\frac{8}{6}\right)[/tex]

[tex]\frac{2}{-12}-\left(\frac{1}{6}-\frac{8}{6}\right)[/tex]

Now, we will combine like terms:

[tex]\frac{2}{-12}-\left(\frac{1-8}{6}\right)[/tex]

[tex]\frac{2}{-12}-\left(\frac{-7}{6}\right)[/tex]

[tex]-\frac{2}{12}+\frac{7}{6}[/tex]

[tex]-\frac{1}{6}+\frac{7}{6}[/tex]

Let us combine like terms:

[tex]\frac{-1+7}{6}[/tex]

[tex]\frac{6}{6}=1[/tex]

Therefore, our expression simplifies to 1.

Answer:

1

Step-by-step explanation:

Brainliest please

Answer:

A. y-axis only

Step-by-step explanation:

We have the graph of  as given below.

It can be seen that  passes through the points (0,0), (4,0) and (6,0).

Also, the graph is plotted in the 1st and 2nd quadrant symmetrically along the y-axis.

Hence, the axis of symmetry of  is the y-axis only.

The graph of r = 1/ (1 - 5sinθ) is symmetric about the y-axis only.

It expresses x and y in terms of r and θ:

x = r cos(θ) , y = r sin(θ)

In polar coordinates, the x-axis corresponds to θ = π/2 and the y-axis corresponds to θ = 0 (or θ = π). So to test for symmetry, we need to check whether replacing θ with π - θ (which reflects the graph across the y-axis) or replacing r with -r (which reflects the graph across the origin) gives us the same equation.

If we replace θ with π - θ, we get:

r = 1 / (1 - 5sin(π - θ)) = 1 / (1 + 5sinθ)

This equation is not the same as the original equation, so there is no symmetry about the y-axis.

If we replace r with -r, we get:

-r = 1 / (1 - 5sinθ)

Multiplying both sides by -1, we get:

r = -1 / (1 - 5sinθ)

This equation is also not the same as the original equation, so there is no symmetry about the origin.

However, if we replace θ with π/2 - θ, we get:

r = 1 / (1 - 5sin(π/2 - θ)) = 1 / (1 + 5cosθ)

This equation is the same as the original equation, so the graph is symmetric about the y-axis.

Therefore, the graph of r = 1/ (1 - 5sinθ) is symmetric about the y-axis only.

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The complete question would be as:

The graph of r = 1/ (1 - 5sinθ) is symmetric about the __________.

A. y-axis only

B. x-axis only

C.Origin only

D.No symmetry

Answer:

40 inches

Step-by-step explanation:

Simply multiply the length value by 12

1 foot = 12 inches