I need help ASAP worth 10 points

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11

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?