The table below shows the height and the hand span of five students. Which pattern of association best describes the relationship between the height and the hand span?

A. no association

B. nonlinear association

C. positive linear association

D. negative linear association

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?