Question

a blue whale calf swam from Miami, Florida, to Havana, Cuba, a distance of 228 miles, in 12 hours 22 minutes. Which is closest to the calf's average rate of speed, in feet per hour?

Answer 1

Answer:
`97,346\ (ft)/(hr)`

Explanation:

You need to make the conversion from miles to feet. Since:

`1\ mi=5,280\ ft`

You get:

`(228\ mi)((5,280\ ft)/(1\ mi))=1,203,840\ ft`

Convert 22 minutes to hours.

Since:

`1\ hr=60\ min`

You get:

`(22\ min)((1\ hr)/(60\ min))=0.3666\ hr`

Therefore, the time in hours is:

`t=12\ hr+0.3666\ hr=12.3666\ hr`

Now you must use the following formula:

`V=(d)/(t)`

Where "V" is the speed, "d" is distance and "t" is time.

You can identify that, in this case:

`d=1,203,840\ ft\\\\t=12.3666\ hr`

Therefore, substituting values into the formula, you get:

`V=(1,203,840\ ft)/(12.3666\ hr)\\\\V=97,346.07\ (ft)/(hr)\\\\V\approx97,346\ (ft)/(hr)`