For 8 weeks of work, mealine will receive $600 and a new computer. After only 6 weeks of work she will receive a new computer but only $150 dollars bonus. How much does the computer cost

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?

Factor the polynomial by its greatest common monomial factor.

Me i’m stuck on all these questions besides the two bottom ones