Question: please answer the following questions and keep working out and explanation seperate Exercise 9E Rates of change WE17 If f (x) =x2+5x+ 15, find: a

please answer the following questions and keep working out and explanation seperate

please answer the following questions and keep working out and explanation seperate

Exercise 9E Rates of change WE17 If f (x) =x2+5x+ 15, find: a the average rate of change between x = 3 and x = 5 b a new function that describes the rate of change c the instantaneous rate of change when x = 5. 2 Z A balloon is inflated so that its volume, V cm', at any time, t seconds, is: 1=$13 + 2412, t E [0, 10] a What is the volume of the balloon when: i t = 0? ii t = 10? b Hence, find the average rate of change between t = 0 and t = 10. c Find the rate of change of volume when: it= 0 ii t = 5 iii t = 10. 3 MC The average rate of change between x = 1 and x =3 for the function y= x- + 3x + 5 is: A 1 B 9 C 5 D 3 E 7

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