## anonymous one year ago help

1. anonymous

@ospreytriple e

2. anonymous

Look at the units. The answer has to be in miles/hour. So you need to divide the number of miles by the number of hours. But there's a twist. The time is given in seconds so you first have to convert it to hours. Try it on your own and see how you get along. I'll be here to help if you need it.

3. triciaal

conversion needed seconds to hours quantity to be determined

4. anonymous

its either A or D

5. Michele_Laino

hint: 25 seconds correspond to 25/3600 hours

6. anonymous

That's right. Can you figure out how many hours 25 seconds is?

7. anonymous

D!

8. anonymous

Nope. Do the math.

9. Michele_Laino

hint: $\Large \frac{{25}}{{3600}} = \frac{{25}}{{36 \times 100}} = \frac{1}{{36 \times 4}} = \frac{1}{{144}}$

10. anonymous

so then A!

11. triciaal

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12. anonymous

That's right. But did you do the math?

13. anonymous

its not A

14. triciaal

multiply by 4 is the same as divide by (1/4)

15. anonymous

Look at the units! Look for the fraction that's got miles divided by time.

16. triciaal

36 miles per hour is correct but the important thing here is how to show the work

17. triciaal

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