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Chapter 6: Q38. (page 279)

You want to save all the money you earn to buy a guitar that costs \(400. You earn \)9 per hour and plan to work 15 hours each week for the next 3 weeks. Will you earn enough money in that time to buy the guitar?

Short Answer

Expert verified

Since the money earned = $405 is greater than the cost of the guitar = $400, this means I鈥檒l earn enough money in that time to buy the guitar.

Step by step solution

01

. Given

The cost of the guitar = $400

Earning = $9 per hour

Work time each week = 15 hours

Number of weeks = 3

02

. To determine

We have to find out if there will be enough money to buy the guitar.

03

. Calculation 

In 1 week, I work 15 hours.

In 3 weeks I work for15脳3=45 hours.

So, the number of work hours in 3 weeks is 45 hours.

We can write the money earned per hour = $9 as:

$91hour

In order to find the money earned in 45 hours, we will multiply numerator and denominator by 45.

$9脳451hour脳45鈬�$40545h

Hence, the money earned in 45 hours is $405.

Since the money earned = $405 is greater than the cost of the guitar = $400, this means I鈥檒l earn enough money in that time to buy the guitar.

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