Amedical battery loses 5% of its power each week. how long will it take until only 20% of
its power remains.

answer if you only know

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?

What are the coordinates of the point that is 1/3 of the way from a to b? a (2,-3) b (2,6)

What is the value of f(x) = 2.2 for f(-2)?