Anumber has 28 ones and 19 tens what is the number

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

If a runner who runs at a constant speed of p miles per hour runs a mile in exactly p minutes what is the integer closest to the value p