The fish tank in paul's bedroom has a pump that will recirculate 75 gallons of water in 1/4 of an hour. find the unit rate in gallons per hour. a. 5 gallons per hour b. 18.75 gallons per hour c. 300 gallons per hour d. 187.5 gallons per hour

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220