How do i find out what the answer is to ? x 5/7 = 30/7 or 4 2/7

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.

Which of these tools or constructions is used to inscribe a hexagon inside a circle?

Ineed to find the answer to number 2