Unit rate of 320 yards in eight minutes

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?

On a piece of paper graph f(x)=5•(0.4)^x

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.