9-80. Simplify each of the following expressions.
9-81. The Wild West West Frontier Park now offers an unlimited day pass. For $29.00, visitors can
go on as many rides as they want. The original plan charged visitors $8.75 to enter the park plus
$2.25 for each ride. Write an equation to determine the number of rides that would make the
total cost equal for the two plans. Solve the equation.
9-82. Do girls read more than boys during the summer? Serena’s class asked 30 parents to
estimate how many pages their child read over the summer. They collected the following data.
a.
Make parallel box plots and compare the center, shape, spread, and outliers.
b. Do girls read more? How many IQRs more do they read? Use the box plots to estimate.