There were 75,000 people in the swamp one saturday afternoon. the number of the people in the swamp was 1.5 times that of the people in dolphin stadium. solve the equation 1.5p = 75,000 to find the number of people p in dolphin stadium.

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?