i need help thankssssssss

Algebra
Tutor: None Selected Time limit: 1 Day

Michael is a sprinter who can run the 50-yd dash in 5.5. sec. he converts his speed into miles per hr, as shown below

50 yds    60 secs    1 hr        3 ft       1 mi

______ X _____ X _____ X ____ X _____

5.5 secs  1 min      60 min    1 yd      5280 ft

which ratio is incorrectly written to coveret his speed

1- 3 ft 1 yd

2- 1 mi 5280 ft

3- 60 sec/1 min

4- 1 hr/60 min

Sep 5th, 2015

Thank you for the opportunity to help you with your question!

The answe r is 4. 1 hr/60 min.

This ratio is incorrectly written. It should have been 60 min/ 1 hr. First no. Of yards covered per Second is calculated as 50 yd/5.5 sec.then this number is multiplied by 60 sec/ 1 min to get yd/min. Then to convert yd/min to yd/hr one needs to multiply by the ratio 60 min/1 hr and not 1hr/60 min.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Sep 5th, 2015

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Sep 5th, 2015
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