(8 points) To make a histogram of students' grades in a certain class, the teacher groups students as follows: 88 students scored between 00 and 6060 66 students scored between 6060 and 7070 1010 students scored between 7070 and 8080 1414 students scored between 8080 and 9090 1212 students scored between 9090 and 100100 Find the area (as a percentage) of each block in the histogram, then find the height (as percent per point) of each block. (You may round to two places after the decimal.) Block for: 00 to 6060 6060 to 7070 7070 to 8080 8080 to 9090 9090 to 100100 Area (%): 20 Height (% per point): 2

Time (minutes) amount of water (gallons) practice 1. jin fills up a 510-gallon pool in the backyard for her children. she fills it with the garden hose at a rate of 17 gallons per minute. after it is filled, she lets it sit for 30 minutes in order to let the water temperature rise. the children then get in and have fun for an hour. the pool loses about 5 gallon of water each minute due to their splashing and playing. at the end of the hour, they tear the pool while getting out, which causes a leak the pool then begins to lose water at a rate of 2 gallons per minute. a. complete the table to show the amount of water in the pool after each minute. b. create a graph to model the problem situation. include when the pool will be empty. c. write a piecewise function that models this problem situation. explain your reasoning for each piece of the function. d. identify the x- and y-intercept. explain what they mean in terms of the problem situation, atamantha a cul 80 100 120 150 200 ning, inc