Precalculus: Mathematics for Calculus, 7th Edition

Published by Brooks Cole
ISBN 10: 1305071751
ISBN 13: 978-1-30507-175-9

Chapter 1 - Section 1.7 - Modeling with Equations - 1.7 Exercises - Page 75: 6

Answer

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

Work Step by Step

To find the formula for a specific variable, simply solve for that variable by isolating it on one side of the equation. Solve for $r$ to have: $\\d=rt \\\dfrac{d}{t}=r \\r=\dfrac{d}{t}$ Solve for $t$ to have: $\\d=rt \\\dfrac{d}{r}=t \\t=\dfrac{d}{r}$
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