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Chapter 2: Q. 389 (page 273)

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

Solve for t 鈸� when d =240 andr= 60 鈸� in general

Short Answer

Expert verified

a.Theformulahavesolutiont=4b.Theformulat=drissolvedfort

Step by step solution

01

Step 1. Given information

The given formula is d = rt .

We have to solve the given eqauation when 鈸� d = 240 and r = 60 鈸� in general.

02

Step 2. Part(a). Explanation

Solve:a.Whend=240andr=60Givenformulad=rt鈬�240=(60)脳t(Substitute)鈬�24060=(60)脳t60(Dividebothsidesby60)鈬�4=t(Simplify)Theformulahavesolutiont=4

03

Step 2. Part(b)

b.IngeneralGivenformulad=rt鈬�dr=rtr(Dividebothsidesbyr)鈬�dr=t(Simplify)Theformulat=drissolvedfort

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