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Temka [501]
3 years ago
8

Alexa has a mask collection of 300 masks. She keeps some in a display case and the rest on the wall. She keeps 17% of her masks

in the display case. How many masks does she keep on her wall?
Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0

Answer:

249

Step-by-step explanation:

All you had to was mulyiply 17 by 3 since 300 is 3 times 100 and 17 percent of 100 is 17

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3. A prop for the theater club’s play is constructed as a cone topped with a half-sphere. What is the volume of the prop? Round
Mariana [72]

The volume of the prop is calculated to be 2,712.96 cubic inches.

<u>Step-by-step explanation:</u>

Step 1:

The prop consists of a cone and a half-sphere on top. We will have to calculate the volumes of the cone and the half-sphere separately and then add them to obtain the total volume.

Step 2:

The volume of a cone is determined by multiplying  \frac{1}{3} with π, the square of the radius (r²) and height (h). Here we substitute π as 3.14. The radius is 9 inches and the height is 14 inches.

The volume of the cone :  V=\pi r^{2} \frac{h}{3} = 3.14 \times 9^{2} \times \frac{14}{3} = 1,186.92 cubic inches.

Step 3:

The area of a half-sphere is half of a full sphere. The volume of a sphere is given by multiplying  \frac{4}{3} with π and the cube of the radius (r³).

Here the radius is 9 inches. We take π as 3.14.

The volume of a full sphere =  V=\frac{4}{3} \pi r^{3} =  \frac{4}{3} \times 3.14 \times 9^{3} = 3,052.08 cubic inches.

The volume of the half-sphere =  \frac{3,052.08}{2} = 1,526.04 cubic inches.

Step 4:

The total volume = The volume of the cone + The volume of the half sphere,

The total volume = 1,186.92 + 1,526.04 = 2,712.96 cubic inches.

5 0
3 years ago
Need help with this didn’t understand it
zaharov [31]

Answer:

Ok, the solution to the first one. See below.

Step-by-step explanation:

1>3-d\\\\\mathrm{Add\:}d\mathrm{\:to\:both\:sides}\\\\1+d>3-d+d\\\\\mathrm{Simplify:}\\\\1+d>3\\\\\mathrm{Subtract\:}1\mathrm{\:from\:both\:sides}\\\\1+d-1>3-1\\\\\mathrm{Simplify:}\\\\d>2

See attachment below.

Best Regards!

6 0
3 years ago
Neeed a lot of help pls answer this pls
daser333 [38]

Answer:

32

Step-by-step explanation:

100: 25

4:1

x : 8

(8x 4) : 8

32: 8

ans 32

7 0
3 years ago
Read 2 more answers
Plz help ASAP I will mark u branliest
-BARSIC- [3]

Answer:

Brainliest?

Step-by-step explanation:

1.

subtract 1 from both sides

divide by 2

2.

add 5 to each side

divide by 4

6 0
3 years ago
Read 2 more answers
46 degrees and x <br><br> X =
vesna_86 [32]

Answer:

136° that's 90 plus 46.........

3 0
3 years ago
Read 2 more answers
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