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Rasek [7]
2 years ago
14

Hellllppppppppppppppp meeeeeeeeeeeee

Mathematics
2 answers:
zubka84 [21]2 years ago
7 0

Answer:20 books

Step-by-step explanation:

because 20% is four books, multiply 4 by five because 100/20 is five. I hope that makes sense

Alexxandr [17]2 years ago
6 0

Answer:

D. 20

Step-by-step explanation:

20% of 20 is 4

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One of the solutions of the system of equations shown in the graph has an x-value of –4. What is its corresponding integer y-val
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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 yo
san4es73 [151]

The volume of the prop is calculated to be 1,875.6 cubic cm.

Step-by-step explanation:

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 8 cm and the height is 12 cm.

The volume of the cone = \frac{1}{3} × 3.14 × 8 × 8 × 12 = 803.84 cubic cm.

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 8cm. We take π as 3.14.

The volume of a full sphere = \frac{4}{3} × 3.14 × r³ = \frac{4}{3} × π × 8³ = 2,143.5733 cubic cm.

The volume of a half-sphere = \frac{ 2,143.5733}{2} = 1,071.7866 cubic cm.

Step 4; The total volume = The volume of the cone + The volume of the half sphere,

The total volume = 803.84 cubic cm + 1,071.7866 cubic cm = 1,875.6266 cubic cm. By rounding this off to the nearest tenth we get 1,875.6 cubic cm.

4 0
3 years ago
Please help me with this question?
IgorLugansk [536]

What is the question?

4 0
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Answer choices are
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8.75 x 10 = 87.50, easiest way to figure out is divide each amount by each answer choice
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