Question

Participants in a psychology experiment were able to memorize an average of M words in t minutes, where M = −0.001t3 + 0.1t2 Estimate the number of words memorizes after 14min where M=-0.001t^3 +0.1t^2

Answer 1

If this is your equation,
M = −0.001t^3 + 0.1t^2
t = 14 min

Substitute 14 for t and solve
M = −0.001t^3 + 0.1t^2
M = −0.001(14)^3 + 0.1(14)^2

Now solve for M = number of words in 14 min