Question

What is the value of time, t, for the given values of distance, d, and rate, r?

d = 425 m, r = 50 m/s

A.
8.5 m

B.
8.5 s

C.
21,250 m

D.
21,250 s

Answer 1

@SolomonZelman

Answer 2

Would it make sense to say, that
\(\large\color{slate}{ d=t\times r }\) ?

Saying that for example, you walked 4 hours, at a rate of 3 mile per hour, then your distance would be:
\(\large\color{slate}{ d=t\times r }\)
\(\large\color{slate}{ d=5(hours)\times 3(miles/hours) }\)
(the hours cancel, and your unit is:)
\(\large\color{slate}{ d=15(miles) }\)

Answer 3

I mean you walked \(\large\color{red}{ 5}\) hours, at a rate of 3 miles per hour....

Answer 4

Is this example making sense?

Answer 5

no not at all im so confused by this all

Answer 6

OK, lets say
`Sam ran 2 hour, with a speed of 7 miles per hour. `
`Would you be able to tell me the distance Sam ran? `

Answer 7

yes 7 + 7 = 14 so sam ran 14 miles right?

Answer 8

but why not multiply 7 times 2?

Answer 9

would you be adding, if Sam ran 100 miles?

Answer 10

no probly not

Answer 11

yes, so if he ran for 100 hours, at a speed of 7 miles per hour, what would you do to calculate the distance ran?

Answer 12

7 x 100?

Answer 13

yes.

Answer 14

So now if you know that Sam ran 800 miles, and he was running at a speed of 4 miles per hour, how would you find the number of hours he ran for?

Answer 15

4 x 800?

Answer 16

no, you already given the distance, it is 800 miles, and he ran with a speed of 4 miles per hour.

Answer 17

Wouldn't you divide the distance (i.e. 800 miles) by the rate (i.e. 4 miles per hour) ?

Answer 18

ah yes

Answer 19

so, you have the same situtation here

Answer 20

Sam ran 425 meters, at a rate of 50 meters per second.

Answer 21

How much did time did he run for?

Answer 22

425 divid by 50?

Answer 23

yes, there you go!

Answer 24

your answer is?

Answer 25

8.5 or B

Answer 26

What did we find just now to be 8.5, the distance traveled or the time?

Answer 27

what have we *found*

Answer 28

the time right?

Answer 29

Yes,

Answer 30

So your answer is?

Answer 31

A or B ?

Answer 32

B

Answer 33

wait A

Answer 34

its A...........right?

Answer 35

B, it is seconds, --- time

Answer 36

oh i see

Answer 37

it is not in meters, b/c that would be distance