Acircle whise area is 4 has a radius of x. find the area with a radius of 3x

The given circle has a radius of x and an area of 4, which in turn equals pi*x^2.

Thus, A = pi*x^2 = 4.

Now if we use 3x instead of x for the circle radius, we get A = pi*(3x)^2, or

A = 9pi*x^2, or 9(pi*x^2), which is 9 times as great as te original area (4). Thus, the area of the larger circle is 9(4) = 36 square units.

10

step-by-step explanation:

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.