Please help me on this thanks! will giv brain liest if right.

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

Is it greater than or less than7*3_9*2

Determine the common ratio and find the next three terms of the geometric sequence. 10, 2, 0.4, a. 0.2; -0.4, -2, -10 c. 0.02; 0.08, 0.016, 0.0032 b. 0.02; -0.4, -2, -10 d. 0.2; 0.08, 0.016, 0.0032 select the best answer from the choices provided a b c d