please help me wih these
1.Find the average value fave of the function f on the given interval.
f(x) = 18x − x2,[0, 4]
2.Find the average value have of the function h on the given interval.
h(x) = 3 cos4 x sin x,[0, π]
3.Find the numbers
b such that the average value of
f(x) = 3 + 10x − 9x2
on the interval [0,
b] is equal to 4.