Question

This is a kinda advanced question and I have 3 more but I will fan and medal! Please help!
(02.08A)A hyena can run one over four mile in 22.5 seconds. Which of the following correctly shows this rate as miles per hour?

one-fourth mile over twenty-two point five seconds = 40 miles per hour
twenty-two point five seconds over one-fourth mile = 40 miles per hour
one-fourth mile over twenty-two point five seconds = 90 miles per hour
twenty-two point five seconds over one-fourth mile = 90 miles per hour
Thank you!

Answer 1

@cliffordtapp

Answer 2

you can work put units into an equation in the same way as numbers so look at this as a similar example:

I can run 100m in 15 seconds -how fast is that in miles per hour?

\[\frac{ 100m }{ 15s } = \frac{ x miles }{ hour }\]

1mile = 1609 m
1 hour = 3600 seconds

so
\[\frac{ 100m }{ 15s} \times \frac{ 3600s }{1 \min } \times \frac{ 1 mile }{ 1609m }\]

you can see that the units cancle out to give miles/hour so multiply out th efractions to get your answer

you just need to do the same with YOUR numbers

Answer 3

! CORRECTION!
middle term should be 3600s /1 HOUR

Answer 4

so I would put 1/4 a mile over 22.5 seconds?

Answer 5

I still don't really get it but oh well lol

Answer 6

yes 1/4 mile/22.5s

(that is the same as 1mile/4*22.5s)

then put the conversion from seconds to hours (1hour = 3600s)

Answer 7

Wait hold on I think I get it. You put the mile on top and the seconds on the bottom

Answer 8

oooh now I get it! Thank you very much!!!

Answer 9

np - well done