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3 years ago

A circle with radius of 2cm sits inside a circle with radius of

Mathematics

1 answer:

Semmy [17]3 years ago

6 0

Answer:

37.70 cm^2

Step-by-step explanation:

area of circle with radius 4 cm = (pi)r^2 = 3.14159 * (4 cm)^2 = 50.27 cm^2

area of circle with radius 2 cm = (pi)r^2 = 3.14159 * (2 cm)^2 = 12.57 cm^2

difference in areas = 37.70 cm^2

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How can you solve for x and y?

galina1969 [7]

ah, those are systems you want one variable to cancel out. I would time the bottom equation by -1 so x cancels then u solve for y. then u plug all back in to solve for x.

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3 years ago

The difference between sixteen, and the product of seven and two

Monica [59]

Answer:

Step-by-step explanation:

If this product was written as an equation, it would look like this:

16 - 7 * 2

PEMDAS states that multiplication comes before addition. So, the first step in the equation is to multiply 7 and 2.

7 * 2 = 14

Now, the equation looks like:

16 - 14

All we need to do now is subtract 14 from 16.

16 - 14 = 2

So, the final answer is 2.

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3 years ago

Read 2 more answers

A pen in the shape of an isosceles right triangle with legs of length x ft and hypotenuse of length h ft is to be built. If fenc

Vaselesa [24]

Answer:

$\frac{8h}{\sqrt{2}} + 16h$

Step-by-step explanation:

First we need to compute the side length as a function of h

So x be the side length of the right isosceles triangle, in Pythagorean formula we have

$x^2 + x^2 = h^2$

$2x^2 = h^2$

$x = \frac{h}{\sqrt{2}}$

The cost for the legs is

$C_l = 4*2x = \frac{8h}{\sqrt{2}}$

The cost for the hypotenuse is

$C_h = 16h$

So the total cost in term of h is

$C = C_l + C_h = \frac{8h}{\sqrt{2}} + 16h$

5 0

3 years ago

Simplify the following rational expression

madreJ [45]

Step-by-step explanation:

as the denominator (x+3) is in both you need only one denominator to be multiplied in first rational number .

2x (x-2). + 5.

(x+3) (x-2). (x+3) (x-2)

2x^2-4x +5

(x+3) (x-2)

it's cannot be solved after that.

8 0

3 years ago

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Stephanie has 6.98 lb of granola to divide into small bags. She will put 0.4 lb of granola in each bag. How many bags will she f

soldier1979 [14.2K]

Answer:

17.45

Step-by-step explanation:

6.98 / 0.4 = 17.45

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3 years ago