John has three pieces of rope. one piece was 31 cm long, one piece was 0.33 m long, and one piece was 0.45 m long. john wants to know how much rope he has?

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Math each whole number with a rational, exponential expression