#### Answer

$r=\frac{d}{t}$
$t=\frac{d}{r}$

#### Work Step by Step

We solve for $r$ by dividing by $t$:
$\displaystyle \frac{d}{t}=\frac{rt}{t}$
$r=\frac{d}{t}$
We solve for $t$ by dividing by $r$:
$\displaystyle \frac{d}{r}=\frac{rt}{r}$
$t=\frac{d}{r}$

Published by
Brooks Cole

ISBN 10:
1305115546

ISBN 13:
978-1-30511-554-5

$r=\frac{d}{t}$
$t=\frac{d}{r}$

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