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Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

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BuyFindarrow_forward

Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
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Alice’s mother wants to wallpaper two adjacent walls in Alice’s bedroom. She also wants to put a border along the top of all four walls. The bedroom is 9 ft by 12 ft by 8 ft high.

a) If each double roll covers approximately 60 ft 2 and the wallpaper is sold in double rolls only, how many double rolls are needed?

b) If the border is sold in rolls of 5 yd each, how many rolls of the border are needed?

To determine

(a)

To find:

The number of double rolls are needed.

Explanation

Postulate:

The area A of a rectangle whose base has length b and whose altitude has length h is given by A=bh

Calculation:

The length of bedroom = 12 ft.

The width of bedroom = 9 ft

The height of bedroom = 8 ft.

Alice’s mother wants to wallpaper two adjacent walls in Alice’s bedroom.

Sketch the following diagram:

To find the number of double rolls are needed:

Each double roll covers approximately 60 ft2.

First we have to find the area needs to be covered.

A=(9)(8)+(

To determine

(b)

To find:

How many rolls of the border are needed.

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