a 140 pund student burns 5.4 calories per minute while playing tennis .after 60 minutes how many calories has the student burned??
also
sam drives at a constant rate of 60 miles per hour . how many hours will it take him to drive 210 miles?
express your answer as a mixed number
plzz help me..
and thank you
(5.4) x (60) = 324 calories
(210) / (60) = 3.5 hours or 7/2 hours
To calculate the number of calories burned by a 140-pound student after playing tennis for 60 minutes, you need to multiply the calories burned per minute by the number of minutes.
Given:
Weight of the student = 140 pounds
Calories burned per minute = 5.4 calories
Step 1: Multiply the calories burned per minute by the number of minutes:
5.4 calories/minute x 60 minutes = 324 calories
So, the student has burned 324 calories while playing tennis for 60 minutes.
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To calculate the number of hours it will take Sam to drive 210 miles at a constant rate of 60 miles per hour, you need to divide the distance by the speed.
Given:
Driving speed = 60 miles per hour
Distance to be covered = 210 miles
Step 1: Divide the distance by the speed:
210 miles / 60 miles per hour = 3.5 hours
Since you need to express the answer as a mixed number, you know that 0.5 hours is equal to 30 minutes. So, 3.5 hours can be expressed as 3 hours and 30 minutes.
Therefore, it will take Sam 3 hours and 30 minutes to drive 210 miles at a constant speed of 60 miles per hour.