3/4 gallon of paint covers 1/3 of the wall then how much paint is needed for the entire wall

Write the sine and cosine values of a, b, respectively, in the figure for (1) and (2) + explanation.

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

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.