Find the derivative of the function. f(x) = In(9x) f'(x) = Need Help? Read It Watch It Find the derivative of the function. h(t) = 5 In(t) h'(t) = Need Help? Read It Watch It Find the derivative of the function. f(x) In In(- 1 9 5x f'(x) = Need Help? Read It Watch It Find the derivative of the function. x + 3 f(x) = In X-3 f'(x) = Need Help? Read It Watch It Find the derivative of the function. f(x) = In((x - 21) f'(x) = Need Help? Read It Watch It Heights of Children For children between the ages of 5 and 13 years, the Ehrenberg equation In(W) In(2.4) + 1.84h gives the relationship between the weight W (in kilograms) and the height h (in meters) of a child. Use differentials to estimate the change in the weight (in kg) of a child who grows from 1.4 m to 1.5 m. (Round your answer to two decimal places.) kg Need Help? Read It Watch It