A tree enthusiast is interested in estimating the typical length of oak tree leaves. He chooses 30 leaves from the oak tree in his backyard.
a. What is the sample in this situation?
b. What is the population in which the tree enthusiast is interested?
c. Is this a biased sampling strategy? If so, identify a population that we can
generalize to, given our sample.

Sam makes his sales calls according to a pattern. he travels either north or south depending on the calendar. some of his past trips were as follows: on february 17, april 24, june 10, september 19, and november 3 he drove north. on february 28, may 25, august 22, november 20, and december 18, he drove south. describe sams' pattern. in which direction will sam drive on oct4 and oct 24?

What does x = in this equation x+3+2x=x+5

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?