If the diameter of a circle is 8, then what is its area and its circumference?

Answers

Answer 1

Answer:

A≈50.27

Diameter = 8

Using the formulas

A=πr2

d=2r

Solving forA

A=1

4πd2=1

4·π·82≈50.26548

Answer 2

Answer:

I think it would be 50.24

Step-by-step explanation:

Here's what I did:

1. Diameter = 8 so radius = 4

2. 4 to the second power is 16

3. 16 × 3.14 = 50.24

I'm not sure if what I did is correct, but I hope this helps! :)


Related Questions

6) Identify the slope (6,2) and (6,-5) *

Answers

Use desmo will help you to find the answer

What is 5/6 of 1/2 on a number line

Answers

Answer:

5/12

Step-by-step explanation:

5/6 of 1/2 is basically 5/6 times 1/12 which is 5/12.

A mountain climber started at 150 feet below sea level. What would he need to climb to so that his starting spot and his ending spot were opposites?

Answers

Answer:

Your answer is 24.333.

Step-by-step explanation:

..If you round this, it would be 24 or 24.3. you get this answer by doing 3650 divided by 150.

Factor the binomial b^2 - 9

Answers

Answer:

(b-3)(b+3)

Step-by-step explanation:

b^2+3b-3b-9

Answer: (b-3)(b+3)
Explanation: Sum-product pattern, then find the common factor(s), rewrite into factored form : )

-9(5x+10) show work please

Answers

Answer:

-45x-90

Step-by-step explanation:

-9*5x=-45

-9*10=-90

An animal shelter houses rabbits​, cats​, and dogs. There are 160 animals at the shelter. Of the​ animals,
1
5 are rabbits.
7
8 of the remaining animals are cats. How many of the animals are dogs​? Show your work.

Answers

Answer:

67

Step-by-step explanation:

BRAINLEST TO WHOEVER GETS THIS CORRECT
Consider matrix V.

Answers

Step-by-step explanation:

The inverse of matrix V the one in answer B

What is the length of BE?
14 units
17 units
27 units
34 units

Answers

Answer:

you have to give is more than that

Step-by-step explanation:

mb 27

Answer:

the length of BE is 27 units

Step-by-step explanation:

What are the growth/decay factors and rates for the following functions?
a. y=1000(1.03)x
b. f(x)=200(0.8)x

Answers

Answer:

gududu0hxosjvacsivhxhvsaiojvxsaxisahvhvhxsaixjs

Drag each capacity to match it to an equivalent capacity.
24 cups
1 gallon
16 fluid ounces
6 pints
Capacity
Equivalent Capacity
2 cups
96 ounces
12 pints
4 quarts



HELP ME

Answers

Answer:

2 cups         ⇔ 16 fluid ounces 96 ounces   ⇔ 6 pints 12 pints        ⇔ 24 cups 4 quarts       ⇔ 1 gallon

Also see attached

Answer:

Solution:

2 cups=16 fluid ounches

96 ounces=6pints

12 pints=24cups

4 quarts=1 gallon

How is x = 5 mathematically different from x > 5?​

Answers

Answer:

in x>5 x is larger than 5

Step-by-step explanation:

x=5 means x is equal to 5

x>5 means x is greater than 5

Answer:

X=5 means that the unknown variable in the equation is equal to the number 5, while x > 5 means that the unknown variable is larger then the number 5.

Step-by-step explanation:

solve for x. (16x + 23)°

Answers

7 is the correct answer

find the geometric mean of 9 and 14

Answers

Answer:

foće de moçhò de casà là ocoreatane

a line has a slope of 9/5 if one of the points on the line is (-10, -16), which of the following could be another point on the line?​

Answers

Answer:

(0,2) is the answer - Option C.

Step-by-step explanation:

Equation of a line:

The equation of a line, in point-slope form, is given by:

[tex]y - y_0 = m(x - x_0)[/tex]

In which m is the slope and the point is [tex](x_0,y_0)[/tex]

Slope of 9/5 if one of the points on the line is (-10, -16)

This means that [tex]m = \frac{9}{5}, (x_0,y_0) = (-10,-16)[/tex]. So

[tex]y - y_0 = m(x - x_0)[/tex]

[tex]y - (-16) = \frac{9}{5}(x - (-10))[/tex]

[tex]y + 16 = \frac{9}{5}(x + 10)[/tex]

Which of the following could be another point on the line?​

We have to find a point for values of x and y which gives us an identity. So

Option A:

x = -5, y = -6

Lets see

[tex]-6 + 16 = \frac{9}{5}(-5+10)[/tex]

[tex]10 = \frac{9*5}{5}[/tex]

[tex]10 = 9[/tex] -> False

So this is not the answer.

Option B:

x = 4, y = 11

[tex]11 + 16 = \frac{9}{5}(4 + 10)[/tex]

[tex]27 = 9*14/5[/tex]

False

Option C:

x = 0, y = 2

[tex]2 + 16 = \frac{9}{5}(x+10)[/tex]

[tex]\frac{90}{5} = 18[/tex]

[tex]18 = 18[/tex]

True, so (0,2) is the answer - Option C.

Please help will mark brainliest.

Answers

Answer:

solution given.:

radius[r] =r

height[h]=1in

volume[V] of cylinder=196πin³

we have

volume[V] of cylinder=πr²h

196π=πr×1

r²=[tex] \frac{196π}{π}[/tex]

r=[tex] \sqrt{196} [/tex]

r=14in

so radius is 14in

Did I do this right? if I didn't get it right can you help me? Thank you!​

Answers

Answer:

the only thing is that your dot should be an open circle because 11 is not included in the answer. If it was less than or equal too, you have a closed dot, but since its just less than its an open dot. I like to think of it like if its closed dot its included, and if its an open dot it falls through the hole and is not included. I don't know if that makes sense, but you've got it otherwise.

Round yo The nearest ten 834,692.
Help me please!!

Answers

The answer should be 834, 690

hope this helps!

834,692

If the number is less than 5, you keep the the 90 the same.

If the number is more than 5, the new number would be 834,700.

The answer is

834,690

Dennis Hampton earns a straight com-
mission of 7% on sales of $5,000 or less
and 9% on sales in excess of $5,000. One
week Dennis had a gross pay of $578.
What were his total sales for that week?

Answers

Answer:

Denis's total sales that week were $ 6,422.22.

Step-by-step explanation:

Since Dennis Hampton earns a straight commission of 7% on sales of $ 5,000 or less and 9% on sales in excess of $ 5,000, if one week Dennis had a gross pay of $ 578, to determine what were his total sales for that week the following calculations must be performed:

7 = 578

100 = X

100 x 578/7 = X

57,800 / 7 = X

8,257.14 = X

9 = 578

100 = X

100 x 578/9 = X

57.800 / 9 = X

6,422.22 = X

Therefore, Denis's total sales that week were $ 6,422.22.

write an expression for b divided by 6



(please only real answers, I am already failing I don't need more bs)​

Answers

Answer:

Well divided by is basically he slash between the things so it would be

b/6

Step-by-step explanation:

÷ is basically (divided by) and whatever number comes first jsut write it like for example

10 divided by 4

10 / 4

Answer:

b/6

Step-by-step explanation:

dont you think thats a bit easy?  B divided by six, b ÷ 6,  b goes in the like box when u do long division and 6 is outside

Twice the product of 6 and 5 is three times as great as this number.what is the number

Answers

Answer:

The number is 20.

Step-by-step explanation:

The product of 6 and 5 is 30.

Two times the product of 30 is 60.

60 divided by 3 is 20.

The number is 20.

During a cross-country road trip, Nathan predicts that he will average 22.6 miles per gallon.
During the trip, he drives 2,882 miles and uses 131 gallons of gas. Calculate his percent error,
rounded to the nearest whole percent.

3%
6%
13%
22%

Answers

9514 1404 393

Answer:

  (a) 3%

Step-by-step explanation:

Nathan's actual mileage was ...

  (2882 mi)/(131 gal) = 22.0 mi/gal

The error can be computed from ...

  error % = (predicted/actual -1) × 100% = (22.6/22 -1) × 100% ≈ 2.73%

Nathan's prediction was high by about 3%.

what is the answer to
2 1/2 x 1 2/5

Answers

Answer:

3.5

Step-by-step explanation:

Answer:

3 1/2 3.5 as a decimal

Step-by-step explanation:

21 and 22 are complementary angles. The measure of Z1 is 45 The measure of Z2 is 3x°. Find the value of x. The figure is not drawn to scale​

Answers

9514 1404 393

Answer:

  x = 15

Step-by-step explanation:

Given:

  ∠1 + ∠2 = 90°

  ∠1 = 45°

  ∠2 = 3x°

Find:

  x

Solution:

  Using the given values in the given equation, we have ...

  45° +3x° = 90°

  15 + x = 30 . . . . . . divide by 3°

  x = 15 . . . . . . . . . . . subtract 15

Find the perimeter of the figure.

Answers

Perimeter
5+5+7+16+7+11 = 51m

PLEASE HELP ASAPPPP!!

question: write in standard form.

2x^2+x^3-3+4x^5

Answers

Answer:

+4X^5+X^3+2X^2-3

Step-by-step explanation:

Hope this helps :*

A BluRay disc normally costs $22. This week it is on sale for 25% off the original price. How much money is discounted from the original price of the BluRay disc?

Answers

Answer:

$7.33

Step-by-step explanation:

22=3/4x

22/.75=22*4/3=29.3333333

$29.33-$22=$7.33

A discounted from the original price of the Blu-ray disc will be $5.5.

What is mean by Percentage?

A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.

To Calculate the percent of a number , divide the number by whole number and multiply by 100.

Given that;

Cost of a Blu-ray disc = $22

The sale on the cost of a Blu- ray = 25%

Now,

Find the discounted price of a Blu-ray as;

Discounted price = 25% of $22

                           = 25 x $22 / 100

                           = $550/100

                           = $5.5

Thus, A discounted from the original price of the Blu-ray disc will be $5.5.

Learn more about the percentage visit:

https://brainly.com/question/843074

#SPJ2

Questlon 3 of 10
Which term describes the distance from the center of a circle to any point on
the circle?
A. Diameter
B. Center
C. Circumference
D. Radius
SUBMIT

Answers

the correct answer is D radius

Radius.

Step-by-step explanation:

Parallelogram ABCD is a rhombus. Side BC = 5cm and segment AO = 3.8cm
What is the area of ABCD?
What is the length of diagonal BD?

Answers

The area of the rhombus ABCD is 24.7 cm².

The length of diagonal BD is 6.5 cm.

What is the area of a rhombus?

A rhombus have equal four sides and the diagonals of the rhombus divides it into four equal right triangles. The area of the rhombus is the sum of individual areas of the four right triangles.

The hypotenuse side of the right triangle = side of the rhombus = BC = 5 cm

One of the legs of the right triangle = AO = OC = 3.8 cmLet the second leg of the right triangle = OB = OD =  x

The second leg of the right triangle is calculated as follows;

[tex]x^2 + 3.8^2 = 5^2\\\\ x^2 = 5^2 - 3.8^2 \\\\ x^2 = 10.56\\\\ x = \sqrt{10.56} \\\\ x = 3.25 \ cm[/tex]

The area of one right triangle of the rhombus is calculated as follows;

[tex]A = \frac{1}{2} (3.8)(3.25)[/tex]

The area of the rhombus ABCD is calculated as follows;

[tex]A = 4 \times \frac{1}{2} (3.8)(3.25)\\\\ A = 24.7 \ cm^2[/tex]

The length of diagonal BD is calculated as follows;

[tex]BD = OB \ + \ OD\\\\ BD = x \ + \ x\\\\ BD = 3.25 \ cm \ + \ 3.25 \ cm\\\\ BD = 6.5 \ cm[/tex]

Learn more about area of rhombus here: https://brainly.com/question/2456096

What is the area, in square feet, of the deck?

Answers

Answer:

42 square feet.

Step-by-step explanation:

A circle has a radius of 5 centimeters. What is its area?

Answers

Answer:

[tex] \bf \huge 78.5 \: c.m.[/tex]

Step-by-step explanation:

Given that :

A circle has a radius of 5 centimeters.

to find :

What is its area?

formulas used :

A = πr²

where,

A = areaπ = 22/7 r = radius

explanation :

finding the area of circle

⟼ A = πr²

⟼ A = 22/7 × 5²

⟼ A = 22/7 × 5 × 5

⟼ A = 3•14 × 5 × 5

⟼ A = 3•14 × 25

⟼ A = 78•5

the area of circle is 78•5 centimeters

the area is 78.5 cm because the formula is A=3.14r^2 or area=3.14•5^2
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