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A middle school has 1200 students. Of these, 25% are in the eighth grade. Yesterday, 95% of all eighth graders were present. How many eighth-grade students were absent yesterday?
calculate 25% of 1200 = 300
Calculate 95% of 300 = 15
300-15 = 285 students of 8th grade were present
The cost to rent an aeroplane is $1500 per day plus $400 per hour of use. What is the maximum number of hours the aeroplane can be used each day if the rental cost is not to exceed $5100 per day?
Subtract the rent 5100 - 1500 = 3600
3600 / 400 = 9 hours
The cost to rent an aeroplane is $500 per day plus $250 per hour of use. What is the maximum number of hours the aeroplane can be used each day if the rental cost is not to exceed $6000 per day?
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