word problem

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

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  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

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