Question: Rob is taking a learning test in which the time he takes to memorize items from a given list is recorded. Let M(t) be the

Rob is taking a learning test in which the time he takes to memorize items from a given list is recorded. Let M(t) be the number of items he can memorize in t minutes. His learning rate is found to be M'(t) = 0.4t − 0.005t²

a. How many items can Rob memorize during the first 10 minutes?

b. How many additional items can he memorize during the next 10 minutes (from time t = 10 to t = 20)?

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