The number of diphtheria cases fell from 175,000 cases before the vaccine to one case after the vaccine was developed. What percent change does this represent?

Andy is making a design using ice cream sticks that are 4 and 1/2 in long he wants this long side of his designed to be no longer than 24 inches what is the greatest number of sticks that any can use on his long side of his design

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length