Answer:
1/10 or 10%
Step-by-step explanation:
1/4 x 2/5 = 1/10 (10%)
Answer:
B. 5 rolls
Step-by-step explanation:
The areas of the room, not including the ceiling, are discriminated as follows:
Longer walls:
(6 inches equals one foot)
Shorter walls:
(6 inches equals one foot)
Window area: ![(4\times3)\times2 = 24ft ^ 2](https://tex.z-dn.net/?f=%284%5Ctimes3%29%5Ctimes2%20%3D%2024ft%20%5E%202)
Door area: ![(7\times3) = 21ft ^ 2](https://tex.z-dn.net/?f=%287%5Ctimes3%29%20%3D%2021ft%20%5E%202)
Area that will be effectively covered:
Total area to wallpaper: ![200 + 168 -24 -21 = 323ft ^ 2](https://tex.z-dn.net/?f=200%20%2B%20168%20-24%20-21%20%3D%20323ft%20%5E%202)
Amount of paper needed: ![323\times1.1 = 355.3ft ^ 2](https://tex.z-dn.net/?f=323%5Ctimes1.1%20%3D%20355.3ft%20%5E%202)
That is, the area of a roll of paper is ![2.5\times30 = 75ft ^ 2](https://tex.z-dn.net/?f=2.5%5Ctimes30%20%3D%2075ft%20%5E%202)
Number of rolls needed:
rolls
Answer: 42.190
Step-by-step explanation:
From the question, the population variances are not equal. The calculation has been attached in the picture below.
The answer is 42.190 to 3 decimal places.
Answer:
Step-by-step explanation:
1,1