Tennis ball machine can launch 60 tennis balls in 12 minutes. At this rate, how many tennis balls can it launch in 2 hours? Prealgebra Ratios, Proportions, Units and Rates Rates 1 Answer Teun · Stefan V. Dec 13, 2016 #(120/12) * 60 = 600# Explanation: There are #120# minutes in #2# hours and #10# sets of #12# minutes in #120# minutes. Therefore, #10# sets of #60# balls launched. #10 xx 60 = "600 tennis balls"# Answer link Related questions Fred worked these hours during the week: #8, 4 1/2, 3 3/4, 7 1/2, 4 3/4#. If he is paid $5.15... Water is flowing out of an artesian spring at a rate of 8 cubic feet per minute. There are 7.5... How many minutes will to drive to Los Angeles from San Francisco if an average speed of 72 mi/hr... Harold bought 5 apples for $1.30. What is the unit price? If Brendan drove 4 miles in 8 hours, how many miles did he drive in 3 hours? A bag of potatoes weighing 5 pounds and 12 ounces cost $2.07. What is the cost of 1 pound of potatoes? What is a rate? What is a ratio? How are rates calculated? How does rate change? See all questions in Rates Impact of this question 3936 views around the world You can reuse this answer Creative Commons License