Explain the meaning your answer terms water flow

Use a trapezoidal sum with the four sub-intervals indicated by the data in the table to estimate . Using correct units, explain the meaning of your answer in terms of water flow. Give 3 decimal places in your answer.

Is there some time t, 0 < t < 8, such that R′(t) = 0? Justify your answer.

For 0 ≤ x ≤ 6, express g(x) in terms of x. Do not include +C in your final answer.