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3 years ago

15

Corey average score after each test is 91% if he gets 78% on his next test what will his new average be

1 answer:

Marianna [84]3 years ago

3 0

Your answer is 89.56 hope this helps and God bless you

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mariarad [96]

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what is the exact circumference of the base of a cone that has a volume of 1014 pi in^3 and a height of 18 in.

Evgen [1.6K]

$\bf \textit{volume of a cone}\\\\
V=\cfrac{\pi r^2 h}{3}\quad 
\begin{cases}
r=radius\\
h=height\\
-----\\
V=1014\pi \\
h=18
\end{cases}\implies 1041\pi =\cfrac{\pi \cdot r^2\cdot 18}{3}
\\\\\\
1041\pi =6\pi r^2\implies \cfrac{1041\pi }{6\pi }=r^2\implies \cfrac{347}{2}=r^2\implies \boxed{\sqrt{\cfrac{347}{2}}=r}\\\\
-------------------------------\\\\
\textit{circumference of a }\stackrel{cone's}{circle}\\\\
C=2\pi r\qquad \qquad C=2\pi \left( \boxed{\sqrt{\cfrac{347}{2}}} \right)$

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3 years ago