change 13/20 to a decimal

Answer:

x = 5 + √3,  5 - √3

which is 6.73 , 3.27 to the nearest hundredth.

Step-by-step explanation:

(x - 5)^2 = 3

Take the square root of both sides:

x - 5 = +/- √3

x = 5 + √3, 5 - √3

Answer:

x = 5 + √3 or x = 5 - √3

Step-by-step explanation:

Equation: (x - 5)² = 3

Square root: x - 5 = ±√3 <-- the square root of a number can be positive or negative.

Subtract: x = 5 + √3 or x = 5 - √3

Answer:

At 10 hours there will be 10 milligrams

Step-by-step explanation:

On a graph your slope would be y= -1x+20 because there where 20 mill at 0 hours and 12 mill at 8 hours. 20-8=12 meaning 1 mill would be deluded every hour. Hope this helps.

Final answer:

Using the exponential decay formula, we can find the half-life of the medication from the initial and given 8-hour amounts and then use it to calculate the amount of medication remaining after 10 hours.

Explanation:

To determine the remaining medication after a given number of hours, we will apply the exponential decay formula which accounts for substances with a half-life. Thus, given that there are initially 20 milligrams of the medication and that it decreases to 12 milligrams after 8 hours, we need to calculate the half-life and then use it to predict the amount remaining after 10 hours.

First, finding the half-life 't1/2' can be done using the formula A = A0×2−t/t1/2, where A is the remaining amount (12 mg), A0 is the initial amount (20 mg), and t is the time elapsed (8 hours). Solving for the half-life gives us t1/2 as the unknown in this equation.

12 mg = 20 mg ×2−(8 hours)/t1/2
Reducing this equation, we find that:
t1/2 = 8 hours / (log2(20 mg/12 mg))

After finding 't1/2', we can then determine the amount remaining after 10 hours. The calculation would be as follows:
A = 20 mg ×2−(10 hours)/t1/2

This will give us the final amount of medication left in the system at the 10-hour mark, rounded to the nearest hundredth.

1 hour = 60 minutes

1 minute = 60 seconds

therefore 2.07 hours = (2.07*60*60) seconds

=7452 seconds

Answer:

7452

Step-by-step explanation:

There are 3600 seconds per hour

60*60= 3600

To find how many seconds are in 2.07 hours you need to multiply 3600 by 2.07

2.07* 3600 = 7452 seconds

Hope This helps

ANSWER

The choice is correct.

[tex]y = {(x -1)}^{2} + 2[/tex]

EXPLANATION

The equation of a parabola in vertex form is given by:

[tex]y = a {(x -h)}^{2} + k[/tex]

where (h,k) is vertex of the parabola and 'a' is the leading coefficient of the parabola.

From the given options, the leading coefficient must be a=1.

We also have the vertex of the parabola at (1,2). This implies that h=1 and k=2.

We substitute these values into the formula to get,

[tex]y = {(x -1)}^{2} + 2[/tex]

The second option is correct.

ANSWER

Relative minimum occurs at x=0

Relative maximum occurs at x=-2

EXPLANATION

The given function is;

[tex]f(x) = 3 {x}^{3} + 9 {x}^{2} - 1[/tex]

We take the first derivative to get:

[tex]f'(x) = 9 {x}^{2} + 18x[/tex]

At turning point f'(x)=0

[tex] 9 {x}^{2} + 18x = 0[/tex]

[tex] 9x(x + 2) = 0[/tex]

[tex]x = 0 \: or \: x = - 2[/tex]

We take the second derivative to get

[tex]f''(x) = 18x + 18

[/tex]

[tex]f''(0) = 18(0) + 18 = 18 \: > \: 0[/tex]

Relative minimum occurs at x=0

[tex]f''( - 2) = 18( - 2)+ 18 = - 18 \: < \: 0[/tex]

Relative maximum occurs at x=-2

Answer:

Relative minimum occurs at x=0

Relative maximum occurs at x=-2

Step-by-step explanation:

Answer:

If you're looking for the absolute value, its 1/64

Step-by-step explanation:

The absolute value is the distance a number is from 0.

1/64 is 1/64th away from 0/64

So, the answer would be 1/64

I hope this helped you! :)

ANSWER

[tex]p(x) = 6x - 15[/tex]

EXPLANATION

The revenue from selling x necklaces is

[tex]r(x) = 10x[/tex]

The cost of buying x necklaces is

[tex]c(x) = 4x + 15[/tex]

The profit from selling x necklaces is

[tex]p(x) = r(x) - c(x)[/tex]

We substitute the functions to get;

[tex]p(x) = 10x- (4x + 15)[/tex]

[tex]p(x) = 10x- 4x - 15[/tex]

[tex]p(x) = 6x - 15[/tex]

Therefore the function for the profit is

[tex]p(x) = 6x - 15[/tex]

Answer:

The length of a leg of the triangle = 59.83 cm

Step-by-step explanation:

Points to remember

If a right angled triangle with angles 45°, 45° and 90° then the sides are in ratio 1 : 1 : √2

It is given a right angled triangle with  45°, 45° and 90° and hypotenuse = 84.6 cm

To find the length of a leg

Let 'x' be the length of each leg,

From the figure we can write,

1: 1 :  √2 = x : x : 84.6

Therefore x = 84.6/√2

 = 59.83 cm

Therefore the length of a leg of the triangle = 59.83 cm

ANSWER

59.82

EXPLANATION

The given right angle is an isosceles right triangle.

Let the length of a leg be x cm.

Then by the Pythagoras Theorem,

[tex] {x}^{2} + {x}^{2} = 84.6 ^{2} [/tex]

[tex]2 {x}^{2} = 7157.16[/tex]

Divide both sides by 2.

[tex]{x}^{2} = \frac{7157.16}{2} [/tex]

[tex]{x}^{2} = 3578.58[/tex]

Take positive square root of both sides to get,

[tex]x = 59.82123369[/tex]

Hence the length of a leg is 59.82 to the nearest hundredth.

Answer: x=8.5 y=1.5

Step-by-step explanation:

Use the second problem and get X by itself. X= 5y+1. Now plug that equation into the 1st equation.

-(5y+1) +9y =-5.

-5y-1+9y=-5.

-5y+9y= 1+5

4y= 6

Y=1.5

Now that you know what is the value of Y you can plug that into any equation.

5(1.5) +1

7.5+1

X=8.5

For this case we have the following system of equations:

[tex]-x + 9y = -5\\x-5y = 1[/tex]

We clear "x" from the second equation and replace it in the first:

[tex]x = 1 + 5y[/tex]

Substituting in the first equation:

[tex]- (1 + 5y) + 9y = -5\\-1-5y + 9y = -5[/tex]

We have similar terms:

[tex]-1 + 4y = -5[/tex]

Adding 1 to both sides of the equation:

[tex]4y = -5 + 1\\4y = -4\\y = \frac {-4} {4}\\y = -1[/tex]

We look for the value of "x":

[tex]x = 1 + 5 (-1)\\x = 1-5\\x = -4[/tex]

Answer:

[tex](x, y): (- 4, -1)[/tex]

For this case we have that by definition, the Greatest Common Factor (GCF) is the largest factor that 2 numbers have in common.

So, we have the following expressions:

[tex]42a ^ 5b ^ 3\\35a ^ 3b ^ 4\\42ab ^ 4[/tex]

We look for the positive integers that divide to 35 and 42 without leaving residue:

42: 1,2,3,6,7,14,21

35: 1,5,7

Thus, the GCF of 42 and 35 is 7

Then, the GCF of the three expressions is:

[tex]7ab ^ 3[/tex]

Answer:

[tex]7ab ^ 3[/tex]

Answer:

A) 7ab^3

Step-by-step explanation:

EDG2021

Answer: Option C

h = 6 or h= -7

Step-by-step explanation:

We have the expression

[tex]h^2-42 = -h[/tex]

To solve add h on both sides of the equality

[tex]h^2+h-42 = -h+h[/tex]

[tex]h^2+h-42 = 0[/tex]

For an equation of the form [tex]ah^2 +bh +c[/tex]  the quadratic formula is

[tex]h=\frac{-b \± \sqrt{b^2 -4ac}}{2a}[/tex]

In this case

[tex]a = 1\\b= 1\\c =-42[/tex]

[tex]h=\frac{-1 \± \sqrt{1^2 -4(1)(-42)}}{2(1)}[/tex]

[tex]h_1=6[/tex]

[tex]h_2=-7[/tex]

The answer is the option C

Answer:

2x-10

Step-by-step explanation:

original equation: 2(×-5)

distributive property: 2(x) 2(-5) =2x-10

Answer:

2x-10

2(x-5)

2*x=2x

2*5=10

Answer:

f(x) = x + 13

Step-by-step explanation:

Given f(x) then f(x) + c represents a vertical translation

• If c > 0 then vertical shift up ↑ of c units

• If c < 0 then vertical shift down ↓ of c units

here c = + 13, hence

f(x) = x + 13

Answer:

108,000 females

Step-by-step explanation:

12% of 900,000 is 108,000.

Therefore, there are 108,000 female officers in the U.S.

Answer: 108,000

Step-by-step explanation:

In 2014, 900,000 sworn law enforcement officers who were serving in the United States and 12% of those officers were female. To find the number of females that were law enforcement officers, we multiply the percentage of females by the total number of law enforcement officers. This will be:

= 12% of 900000

= 12/100 × 900000

= 0.12 × 900000

= 108,000

There were 108,000 females as law enforcement officers serving in the United States.

Let the base = x

Then the height would be 2x ( twice the length of the base.

Now using the given formula you get:

25 = 1/2 * 2x *x

Multiply 2x by 1/2:

1/2 * 2x = 2x/2

25 = 2x/2 * x

2x/2 = 1x, now you have:

25 = x *x

Multiply x by x:

25 = x^2

Take the square root of both sides:

x = √25

x = 5

Answer:

17/13

Step-by-step explanation:

Answer:

Step-by-step explanation:

" / " indicates "division" and should not be used in this context.

If you meant:  -2 square root 13 plus 19 square root 13, the simplest result would be 17 square root 13.

Note that if you click on the "omega" symbol (below), a menu of symbols will appear, including the square root symbol √.

Then:  -2√13 + 19√13 = 17√13.

Answer:

2520

Step-by-step explanation:

7×6×5×4×3 = 2520

Imagine □□□□□

For the 1st □, there are 7 choices

For the 2nd □, there are 6 choices (since 1 out of the 7 numbers is already used)

For the 3rd □, there are 5 choices (since 2 out of the 7 numbers are used)

And so on...

The total number of 5-digit numbers that can be formed with the digits 1 to 7, without repetition, is 2520.

Your question pertains to the concept of permutations - the number of ways items can be arranged without repetition. In this case, you are considering how many 5-digit numbers can be formed using the digits 1, 2, 3, 4, 5, 6, 7 without repeating any digit.

A helpful way to think about this is to think of the 5 places for our 5-digit number (i.e., _ _ _ _ _). For the first position, you have 7 choices (the digits 1 to 7) to choose from. Once you have chosen a digit, you are left with 6 choices for the second position, 5 for the third position, 4 for the fourth, and finally 3 for the fifth. So, the total number of 5-digit numbers you can form is 7 × 6 × 5 × 4 × 3 = 2520.

https://brainly.com/question/23283166

#SPJ11

Answer:

y- intercept = 4

Step-by-step explanation:

The y- intercept is the value of the y- coordinate where the line crosses the y- axis.

Here the y- intercept = 4 or (0, 4) ← coordinates of point

Answer:

( 0 , 4 )

Step-by-step explanation:

The y - intercept of the line is where the line hit's or crosses the y - axis and in the case since the line goes through 4 on the y - axis

Answer:

8 inches

Step-by-step explanation:

Surface area of a prism is:

S = 2A + Ph

where A is the area of the base, P is the perimeter of the base, and h is the height of the prism.

The base is a square, so A = s² and P = 4s:

S = 2s² + 4sh

Given that S = 512 and h = 12:

512 = 2s² + 4s(12)

512 = 2s² + 48s

256 = s² + 24s

0 = s² + 24s - 256

0 = (s + 32) (s - 8)

s = -32, s = 8

Since s must be positive, s = 8 inches.

Follow below steps;

To find the length of the square base of the right prism:

First, calculate the lateral surface area: 512 in² = 4s * 12 where s is the side length of the square base.

Then, solve for s: 512 = 48s, s = 512 / 48 = 10.67 in.

Therefore, the length of the square base is 10.67 inches.

Answer:

Option D is correct.

Step-by-step explanation:

We need to find the pattern in the values as the exponents increase.

First value is 1/3

if we multiply 3 with 1/3 i.e. 1/3*3 we get 1

The next value is 1 in the table.

Now, if we multiply 1 with 3 i.e. 1*3 we get 3

The next value is 3 in the table.

Now, if we multiply 3 with 3 i.e 3*3 we get 9

So, the next value is 9 in the table.

So, if we multiply 3 with the previous value we get the next value in the table.

Hence Option D multiply the previous value by 3 is correct.

To convert feet per minute into miles per hour, use the conversion factor of 5280 feet in 1 mile and 60 minutes in 1 hour. Divide the given value by 5280 to get the number of miles, then divide the result by 60 to convert minutes to hours.

To convert feet per minute into miles per hour, you need to use the conversion factor of 5280 feet in 1 mile and 60 minutes in 1 hour. Here's the step-by-step calculation:

For example, if you have a speed of 300 feet per minute:

https://brainly.com/question/19420601

#SPJ12

let's firstly convert the mixed fractions to improper fractions and then add them up.

[tex]\bf \stackrel{mixed}{36\frac{4}{9}}\implies \cfrac{36\cdot 9+4}{9}\implies \stackrel{improper}{\cfrac{329}{9}} \\\\\\ \stackrel{mixed}{10\frac{2}{9}}\implies \cfrac{10\cdot 9+2}{9}\implies \stackrel{improper}{\cfrac{92}{9}}~\hfill \stackrel{mixed}{18\frac{2}{9}}\implies \cfrac{18\cdot 9+2}{9}\implies \stackrel{improper}{\cfrac{164}{9}} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\bf -\cfrac{329}{9}-\cfrac{92}{9}-\cfrac{164}{9}\implies \stackrel{\textit{using the LCD of 9}}{\cfrac{-329-92-164}{9}}\implies -\cfrac{585}{9}\implies -65[/tex]

Answer:

Answer:

The answer is 14

Step-by-step explanation:

IT IS NOT 82 I JUST TOOK THE TEST AND IT WAS WRONG...THE ANSWER IS 14!

The driver expects to be tipped approximately $14.

Given is that Hector paid $68 for a taxi ride. This driver has a sign above his mirror that recommends a 20% tip.

The amount recieved as a tip is given as -

20% of 68

20/100 x 68

13.6

Therefore, the driver expects to be tipped approximately $14.

To solve more questions on algebraic expressions, visit the link below-

brainly.com/question/1041084

#SPJ6

When eggs are delivered, if one notices that B. The shells of the eggs have cracks in them, the eggs should be rejected.

Eggs that have cracks in them can be potentially dangerous to people because microorganisms like bacteria can enter through those cracks and either spoil the egg or make it harmful for consumption.

It is therefore best that an egg that has a crack, be rejected upon delivery.

Other options are incorrect because:

In conclusion, if an egg has a crack in it upon delivery, it should be rejected.

Find out more at https://brainly.com/question/17894532.

Answer: a lower annual interest fee is better than a low annual fee if you expect to pay your balance in full during most months

Final answer:

A lower annual interest fee is generally better than a low annual fee when it leads to significant savings over time, especially with large amounts or long-term financial products. Interest rates dictate the overall cost of borrowing more than annual fees, particularly for longer terms or larger sums. However, for small, short-term borrowing, a low annual fee might be more beneficial.

Explanation:

When comparing a lower annual interest rate versus a low annual fee, it is essential to consider the specific financial situation and the amount of money involved. As a general rule, a lower interest rate is beneficial when it leads to significant savings on the overall interest paid throughout the loan or credit product term. This is often the case for larger amounts or longer terms where the interest accumulates considerably over time.

For example, financial investors who choose a Certificate of Deposit (CD) earn a higher interest rate compared to savings accounts, as they agree to leave the money deposited for a fixed period, forgoing liquidity. However, if interest rates rise after a loan is made, the existing loan with the lower interest rates becomes less attractive. On the other hand, if the economy experiences a fall in interest rates, the value of the loan with the previously fixed lower rate increases.

Therefore, while a low annual fee can seem attractive, it's the annual interest that ultimately has a more significant impact on the cost of borrowing, especially over longer periods or with larger sums of money. Conversely, for small short-term loans or when the outstanding balance is frequently paid off, a low annual fee might be more advantageous than a lower interest rate, as the interest charges could be minimal.

Answer:

Step-by-step explanation:

The question does say at most 10. That includes 10. So the circle on 10 should indicate it is closed or fully filled in.

The shading should go left. It should indicate less than 10.

Answer:

-6

Step-by-step explanation:

Let x =1

F(x)=-x^3-2x^2+7x-10

F(1) = - (1)^3 -2(1)^2 +7(1) -10

     = -1 -2 +7-10

    = -3+7-10

   =-6

The output of the given function F(x)=-x^3-2x^2+7x-10 when x equals 1 is -6. We substituted x=1 into each term to calculate this.

The given function is F(x)=-x^3-2x^2+7x-10. To find the output of the function when x equals 1, you substitute '1' in place of 'x' in the equation. So let's calculate:

Now, add all the results together: -1 - 2 + 7 - 10 = -6. Therefore, when x equals 1, the output of the function F(x) is -6.

https://brainly.com/question/12056604

#SPJ3