Kayli is traveling in care at 45 miles per hour. How many feet per second is she traveling?

You can convert 45 miles per hour to feet per hour:
45 × 5,280 = 237,600 feet per hour
Now you also should remember that there are 60 minutes in an hour. && 60 seconds in a minute. So you can divide 237,600 feet per hour by 60 to get feet per minute:
237,600 ÷ 60 = 3,960 feet per minute
Now you just have to divide 3,960 by 60 again to get feet per second:
3,960 ÷ 60 = 66 feet per second
Now you know how fast the car can travel (in feet) in a second. So to figure out how many feet it travels in 3 seconds, you just have to multiply 66 by 3:
66 × 3 = 198 feet
final answer is 198 feet.

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