The bedroom is 17 feet long by 18 feet wide, and the ceiling is 9 feet high. the inside of the bedroom door will be painted the same color as the walls. two coats of paint will be applied to all of the painted surfaces. the room has one window, measuring 3 feet, 9 inches by 4 feet, which will not be painted. list the facts that you know. first, find the room dimensions in feet that make a good model for this situation. one strategy would be to sketch the room as follows. use this model to complete the following table below.

615 ft²

Step-by-step explanation:

There are 4 walls - assume that the floor and ceiling are not being painted.

2 walls are 17 ft by 9 ft ⇒ 2(17)(9) = 306 ft²

The other 2 walls are 18 ft by 9 ft ⇒ 2(18)(9) = 324 ft²

1 window is 3.75 ft by 4 ft ⇒ 1(3.75)(4) = 15 ft²

2 walls + other 2 walls - 1 window ⇒ 306 + 324 - 15 = 615 ft²

The total area that must be paintedis 615ft^2

Step-by-step explanation:

Here we need to calculate the total surface of the room that will be painted, this would be:

The 4 inner walls.

Minus the area of the window, that will not be painted.

I also assume that the floor and the ceiling will not be painted.

the dimensions of the room are:

17 feet long.

18 feet wide.

9 feet high.

So we will have:

two walls of 17 feet by 9 feet.

two walls of 18 feet by 9 feet.

Then the total surface of the walls is:

S = 2*(17ft*9ft) + 2*(18ft*9ft) = 630 ft^2

And the window is 3 feet 9 inches bt 4 feet.

first, we have that 1 feet = 12 inches.

then 9 inches is equivalent to:

9/12 feet = 0.75 feet.

So the area of the window is:

W = 3.75ft*4ft = 15ft^2

the difference is:

A = 630ft^2 - 15ft^2 = 615ft^2

step-by-step explanation:

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional