Lim(-x^3-2x^2+4x+6) as x approaches -3

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry

Anumber cube is rolled two times in a row. find the probability it will land on 2 on the first roll and a number greater then 4 on the second roll