I need a bit of help on this

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

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.

Find cot x if sin x cot x csc x = √2