HELP. what is the speed of a boat in miles per hour that travels 20 miles in 45 minutes?

1 answer:

6 0

Average speed = (distance covered) / (time to cover the distance)

= (20 miles) / (45 minutes)

Multiply that fraction by (60 minutes / 1 hour) .
This is equal to ' 1 ', so you won't change anything except the units.

= (20 miles / 45 minutes) times (60 minutes / 1 hour)

Multiply the fractions, then cancel 'minutes' out of
the numerator and denominator.

= (20 miles x 60) / (45 x 1 hour)

= (20 x 60 / 45) miles/hour

= 26-2/3 miles/hour .

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Answer:

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Explanation:

<u>Charge of an Electron</u>

Since Robert Millikan determined the charge of a single electron is

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