If juan drives 50 miles per hour for 1.5 hours and then 70 miles per hour for 0.5 hours, then how far did he drive?

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 measure of angle 0 is 600 degrees

Plz hurry evaluate the expression a+b where a=8 and b=19