Question

3. Melissa knows that 30 miles per hour is equivalent to

44 feet per second. If Melissa drives at a speed of
70 miles
per hour, which of the following is closest to
hor speed in fcet per second?

Answer 1

`7 0 miles/hour = 103 feet/second`

Explanation:

Given

`30 miles/hour = 44 feet/second`

Required

Determine the equivalent of 70 miles per hour

`30 miles/hour = 44 feet/second`

Multiply both sides by 7/3

`(7)/(3) * 30 miles/hour = (7)/(3) * 44 feet/second`

`7 * 10 miles/hour = (7)/(3) * 44 feet/second`

`7 0 miles/hour = (7)/(3) * 44 feet/second`

`7 0 miles/hour = (308)/(3) feet/second`

`7 0 miles/hour = 102.67 feet/second`

`7 0 miles/hour = 103 feet/second` (Approximated)