Find the volume of the composite solid. round your answer to the nearest tenth.

  1206.4 ft³

Step-by-step explanation:

The formula for the volume of a cone is ...

  V = (1/3)πr²h

Here, the radius is 8 ft and the height is 6 ft, so the volume of the conical top of this solid is ...

  V = (1/3)·π·(8 ft)²·(6 ft) = 128π ft³

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The formula for the volume of a cylinder is ...

  V = πr²h

Here, the radius is 8 ft and the height is 4 ft, so the volume of the cylindrical bottom of this solid is ...

  V = π·(8 ft)²·(4 ft) = 256π ft³

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Then the total volume of the solid is the sum of these, or ...

  total volume = volume of cone + volume of cylinder

  = 128π ft³ + 256π ft³ = 384π ft³

  total volume ≈ 1206.4 ft³

We used a value of pi with sufficient accuracy to give us 6 good significant digits in the answer. That is necessary if we're to round to 5 significant digits. (3.14 doesn't work for this; it gives you 1205.8 ft³.)

which expression represents the approximate length of bc?

step-by-step explanation:

i dont understand the question? ?

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