The graph shows a probability distribution.
What is P(X<3)?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

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?

Tom drove 206 miles in 3.9 hours. estimate his average speed.