3 years ago

At what point does π/2 intersect the unit circle?

Mathematics

1 answer:

Harman [31]3 years ago

4 0

Answer:

when it gets in the middle

Step-by-step explanation:

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Find the volume of a right circular cone that has a height of 6.7 in and a base with a circumference of 9.8 in. Round your answe

bulgar [2K]

We just did one like this; let's do this a different way.

$V=\frac 1 3 \pi r^2 h$

$2 \pi r = 9.8 \textrm{ in}}$

$r = 9.8 / (2 \pi) \approx 1.55972$

$V=\frac 1 3 \pi r^2 h = (1/3) \pi (1.55972)^2(6.7) = 17.01$

Answer: 17.1 cubic inches

7 0

3 years ago

The volume of this cylinder is 2,034.72 cubic inches. What is the radius?

jasenka [17]

$\textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ V=2034.72\\ h=18 \end{cases}\implies 2034.72=\pi r^2(18) \implies \cfrac{2034.72}{18\pi }=r^2 \\\\\\ \cfrac{2034.72}{18(3.14) }=r^2\implies \sqrt{\cfrac{2034.72}{18(3.14) }}=r\implies 6=r$