Ben is 39 and joe is 3, how many years will it take until ben is 4 times as old as joe?

Ineed to learn how to solve this problem

True or false? a triangle can be circumscribed about a given circle

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample