38=x+10+9-3
I don't get this question

You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

1: 4 if the wew 35 surfboards at the beach how many were short boards?