If n represents an even number, then which of the following statements is true?
A. n ÷ 7 represents an odd number
B. n × 7 represents an even number
C. n - 7 represents an even number
D. n + 7 represents an even number

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Icould really use some with this question.

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?