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zubka84 [21]
3 years ago
6

What is the sum of –356.1 + 258.6? –614.7 –97.5 97.5 614.7

Mathematics
2 answers:
Debora [2.8K]3 years ago
7 0
The answer is B. BC we know the answer anti C or D BC u got to have a negative number.

ludmilkaskok [199]3 years ago
5 0
Your answer would be -97.5. The reason why is because the integer rules say:

Same sign add and keep, different signs subtract, take the sign of the highest number, and that'll be exact.

And since -356.1 is greater than 258.6, then you'll take the sign of -356.1, which is negative.

I hope I helped :)
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The volume of the composite figure is the third option 385.17 cubic centimeters.

Step-by-step explanation:

Step 1:

The composite figure 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 3.1415.

The radius is 4 cm and the height is 15 cm.

The volume of the cone :

V = \frac{1}{3} \pi r^{2} h = \frac{1}{3} (3.1415)(4^{2} )(15) = 251.32 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 4 cm. We take π as 3.1415.

The volume of a full sphere \frac{4}{3} \pi r^{3} = \frac{4}{3} (3.1415) (4^{3}) = 268.07 cubic cm.

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Step 4:

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

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