The rate of growth of a tree is calcuated ltaewaccording to the formua : dh/dt = 2+ 1/2t raised to the power of a half (1/2) where h is the height of the tree in metres and t is time in years.
a) How much does the tree grow between the first and the fourth year?
b) How much does the tree grow between the fourth and ninth year?

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Is your 't' raised to the power of 1/2?

yes

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