Determine the gear ratio for a bike with 45 front teeth and 18 rear sprocket teeth. 18/45 = 0.4
45/18 = 2.5
18(45) = 810
45 – 18 = 27
CONTINUED

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?

What is the point slope form of a line with slope -5 that contains point (2,-1)

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.