Respuesta :

Answer:

C

Step-by-step explanation:

Let's find the area of each of the two circles.

First Circle:

The first circle has a diameter of 10 inches. That means the radius is 5 inches. So, its area is:

[tex]A=\pi r^2\\A=\pi (5)^2\\A=25\pi[/tex]

Second Circle:

The second circle has a diameter twice that of the first. So, the diameter is 20 inches. This means that the radius is 10 inches. Find the area:

[tex]A=\pi r^2\\A=\pi (10)^2\\A=100\pi[/tex]

Now, find the ratio between them by dividing:

[tex]\frac{\text{Smaller}}{\text{Larger}}=\frac{25\pi}{100\pi}[/tex]

Simplify:

[tex]\frac{\text{Smaller}}{\text{Larger}}=\frac{1}{4}[/tex]

1/4 is the same as 1:4

So, our answer is C      :)

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