(diameter of the circle supposedly below = 20)

joan determined that the area of the circle below is 400πcm^2. melinda says that joan’s solution is incorrect; she believes that the area is 100πcm^2. who is correct and why?

Melinda is correct, 100 π cm² may be the area of circle

Step-by-step explanation:

It is given that, the diameter is less than 20.

Therefore radius is always less than 10 (20/2)

If radius = 10 then area = πr² =  π(10)² = 100 π cm²

Therefore the maximum value of area is 100 π cm²,

it never be 400 π cm².

Joan determined that the area of the circle below is 400 π cm²

So it is false.  Melinda says that Joan’s solution is incorrect; she believes that the area is 100πcm^2.

Therefore Melinda is correct, 100 π cm² may be the area of circle

8 2/3 is the answer

step-by-step explanation: just use a calculator