What is 0.4/100 a fraction in it's simplest form and a decimal?​

What is the slope of a line that is perpendicular to y = 3x + 1

7(x - 2) = 3(x + 4) solve the following equation. then enter your answer in the space provided using mixed number format.

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?