What are the coordinates of b

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.

Solve -.016x= -16. need solving this

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.