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Chapter 2: Q. 393 (page 273)

In the following exercises, use the formula d = rt .

Solve for r 鈸� when d= 420 andt= 6 鈸� in general

Short Answer

Expert verified

a.Theformulahavesolutionr=70bTheformular=dtissolvedforr

Step by step solution

01

Step 1. Given information

The given formula is d = rt .

We have to solve the given eqauation when 鈸� when d= 420 andt= 6 鈸� in general.

02

Step 2. Part(a) Explanation

Solve:a.Whend=420andt=6Givenformulad=rt鈬�420=r脳(6)(Substitute)鈬�4206=r脳(6)6(Dividebothsidesby6)鈬�70=r(Simplify)Theformulahavesolutionr=70

03

Step 2. Part (b)

b.IngeneralGivenformulad=rt鈬�dt=rtt(Dividebothsidesbyt)鈬�dt=r(Simplify)Theformular=dtissolvedforr

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