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Chapter 2: Q. 2.119 (page 269)

Solve the formula d = rt for r : 鈸� when d = 180 and t = 4 鈸� in general

Short Answer

Expert verified

a.Thesolutionforthegivenformulaisr=45b.Theformular=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� d = 180 and t = 4 鈸� in general

02

Step 2. part(a)  Explanation

Solve:a.Whend=180andt=4Givenformulad=rt鈬�180=r脳(4)(Substitute)鈬�1804=r脳(4)4(Dividebothsidesby4)鈬�45=r(Simplify)Theformulahavesolutionr=45

03

Step 2, Part(b) 

b.IngeneralGivenformulad=rt鈬�dt=rtt(Dividebothsidesbyt)鈬�dt=r(Simplify)Theformuladt=rissolvedforr

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