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Gnesinka [82]
4 years ago
14

Determine the radius of a cylinder with a volume of 163 ft cubed with a height of 4 ft​

Mathematics
1 answer:
monitta4 years ago
8 0

The volume of a cylinder is given by the product of its base area (i.e. the area of a circle) and its height:

V = \pi r^2\cdot h

Solving for r, we have

r=\sqrt{\dfrac{V}{h\pi}}

Plugging the numbers, we have

r=\sqrt{\dfrac{163}{4\pi}} \approx 3.6

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Answer:

x=+i\sqrt{20}\approx+4.472i

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Step-by-step explanation:

Starting from x^2+20=0, we do x^2=-20, which means x=\pm\sqrt{-20}, which can be written as x=\pm\sqrt{(-1)(20)}, which gives us x=\pm\sqrt{(-1)}\sqrt{(20)}, which we know is x=\pm i \sqrt{(20)}, so our solutions are:

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x\approx-4.472i

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