All categories

3 years ago

What is the area of a circle if the circumference is 30cm (express your answer in centimetres)

1 answer:

4 0

So before we can find the area, we first have to find the radius. We will do this by using the circumference formula, C = 2πr, to find the radius. Our equation will look like this: 30 = 2πr .

For this, all you need to do is divide both sides by 2π, and your answer will be 4.77 cm = r.

Now that we got the radius, we can solve for the area, which is A = πr^2.

A = π(4.77)^2

A = 22.7529π cm^2 or 71.48 cm^2

You might be interested in

the area of a parallelogram is 96 cm squared. The height of the parallelogram is 4 cm less than the length of the base. What is

ohaa [14]

24???????????????????????????????????????????????????????????????????????

6 0

3 years ago

Read 2 more answers

Can someone help me find AC

Kryger [21]

Answer:

1.4

Step-by-step explanation:

simply use your theta the top angle of 35 degrees hit sin on your calculator set up the proportion

x .700

2 1

cross multiply to end up with 1.4

4 0

3 years ago

Part A

spayn [35]

Answer:

Part A:

1120 inches cubed

Part B:

Base X Height

Step-by-step explanation:

4 0

3 years ago

The equation of the tangent to the curve x^2 = 4y at the point on the curve where x=-2 is?

aleksandrvk [35]

$x^2 = 4y \Rightarrow y= \frac{x^2}{4}$
$\frac{dy}{dx} = \frac{2x}{4} = \frac{x}{2}$

(x = -2) $\frac{dy}{dx} = \frac{x}{2} = \frac{-2}{2} = -1$
(x = -2) $y= \frac{x^2}{4}= \frac{(-2)^2}{4} = 1$

$y-y_1=m(x-x_1)$
$y-1 = -1(x--2)
$
$y-1 = -1(x+2)$
$y-1 = -x-2$
$y=-x-1 = -(x+1)$

7 0

3 years ago

Read 2 more answers

Sanford the elf has been asked to choose toys for a child who wants a baby doll, a jigsaw puzzle, and a stuffed dog. He looks on

zmey [24]

Answer: There are 198 different combinations.

Step-by-step explanation:

To solve this type of problem, first, we need to identify the selections.

We have 3 selections.

Baby doll, Jigsaw puzzle, and a stuffed dog.

Now, we need to count the numbers of options for each case:

Baby doll: 11 options.

Jigsaw Puzzle: 6 options.

Stuffed dog: 3 options.

To find the total number of different combinations, we need to multiply all the numbers of options together, this is:

Combinations = 11*6*3 = 198

There are 198 different combinations.

5 0

3 years ago