Question

I just need to answer the question number one NOT two .I just need a brief explanation with the answer

Answer 1

The bedroom of the apartment has 4 walls.

2 of them have the following dimensions: 16ft x 8ft.

2 of them have the following dimensions: 10ft x 8ft.

Find the area of each wall and then add them to find the total area:

`\begin{gathered} Aw1=16ft\cdot8ft=128ft^2 \\ Aw2=10ft\cdot8ft=80ft^2 \end{gathered}`
`\begin{gathered} TA=2\cdot Aw1+2\cdot Aw2 \\ TA=2\cdot128ft^2+2\cdot80ft^2 \\ TA=256ft^2+160ft^2 \\ TA=416ft^2 \end{gathered}`

It means that the total area to be covered is 416ft^2.

Now, divide this area by the area that can be covered by one roll of wallpaper to find the number of rolls needed:

`n=(416ft^2)/(50ft^2)=8.32`

It means that 8.32 rolls are needed to cover the bedroom. You will have to buy 9 rolls.