Question 99245
You know that there are 5280 feet in a mile.

You can find the distance in miles that the ball traveled from the pitchers mound to the plate by dividing.

{{{60.5/5280=.011458333}}}
now you find how many hours elapsed
{{{.4/60/60=.000111111}}} note that 60 seconds in a min and 60 mins in an hour

now by dividing the time by the distance you can find the mph of the ball
{{{.011458333/.0001111111=103.125}}}

the ball traveled aprox 103 mph