Last week, Amy drove n miles. This week, she drove 139 miles. Using n, write an expression for the total number of miles she drove in the two weeks

25 ! i need asap! ! ill mark brainliest!

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?

Ineed here’s a picture of the question