Question

help @az

Answer 1

Alright, so we have 75 mph

MPH is miles per hour

and they want to know how long it takes to travel 45 FEET

Answer 2

So the first thing we have to do is convert from miles to feet

Do you know how many feet are in a mile?

Answer 3

5280 feet

Answer 4

Good! So

we're travelling at
75 miles per hour

75 miles in 1 hour

how many feet would 75 miles be?

Answer 5

396000 feet

Answer 6

Good so that means

75 miles per hour is the same as

396,000 feet per hour

Now we should probably change hours to something like seconds just so that way we don't get an answer like it takes 0.000023123 hours to drive 45 feet
(just a random number, it's not the answer)

So how many seconds are there in an hour?

Answer 7

3600

Answer 8

Good!

So we have



can you divide 396,000 by 3600

Answer 9

110

Answer 10

Good so now we know

that 75 MILES per HOUR

is the same thing as 110 FEET per SECOND

okay, now the question is asking us

how long does it take to travel 45 feet

Answer 11

how would we set it up

we have 45 feet

would we multiply by

110 feet/ 1 sec

or by

1 sec / 110 feet

Answer 12

1sec/110 feet

Answer 13

Good! That would allow us to cancel out the feet and give us an answer that has a unit of time (which is seconds)

So what do you get

45 feet * 1 sec/ 110 feet

Answer 14

.4090

Answer 15

So that's your answer in seconds!