Adrianne wanted to donate some of her shoes to the homeless. she had a total of 28 pairs of shoes in her closet, 75% of them were tennis shoes. if she have all of her tennis shoes to the homeless, how many pairs of shoes does she have left? write the answer in the box:

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?