Question 1026174
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In the formula {{{highlight(cross(rt + d))}}} rt = d, r is rate, t is time and d is distance. 
What is the rate for a runner who completes 7.5 miles in 1.5 hours?
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{{{7.5/1.5}}} = .(?). mph.


Please calculate it yourself.


And notice please that I edited your formula.