If there are 200 chinchillas in a room and 2 die and 4 have 1 baby how many chinchillas are in the room

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?

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar, how much will the car be worth in 8 years?

How many and of which kind of roots does the equation f(x)=x3−x2−x+1