Answer:
r = 51.96 inches
Step-by-step explanation:
![V_{cone} = \pi {r}^{2} h \\ \\ \implies \: r^{2} = \frac{V_{cone}}{\pi h } \\ \\ \implies \: r^{2} = \frac{942}{3.14 {(9) } }\\ \\ \implies \: r^{2} = \frac{942}{3.14 {(9) } } \\ \\ \implies \: r^{2} =2700 \\ \\ \implies \: r= \sqrt{2700} \\ \\ \implies \: r=51.96 \: inches](https://tex.z-dn.net/?f=V_%7Bcone%7D%20%3D%20%5Cpi%20%7Br%7D%5E%7B2%7D%20h%20%20%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20r%5E%7B2%7D%20%20%3D%20%20%5Cfrac%7BV_%7Bcone%7D%7D%7B%5Cpi%20h%20%7D%20%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20%20r%5E%7B2%7D%20%3D%20%20%5Cfrac%7B942%7D%7B3.14%20%7B%289%29%20%7D%20%7D%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20%20r%5E%7B2%7D%20%3D%20%20%5Cfrac%7B942%7D%7B3.14%20%7B%289%29%20%7D%20%7D%20%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20%20r%5E%7B2%7D%20%3D2700%20%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20%20r%3D%20%5Csqrt%7B2700%7D%20%20%5C%5C%20%20%5C%5C%20%20%5Cimplies%20%5C%3A%20%20r%3D51.96%20%5C%3A%20inches)
Answer:
4.5 / B
Step-by-step explanation:
Answer:
69.75 6975/100 92%
Step-by-step explanation:
Answer: ![\bold{S_{\infty}=\dfrac{3125}{2}=1562.5}](https://tex.z-dn.net/?f=%5Cbold%7BS_%7B%5Cinfty%7D%3D%5Cdfrac%7B3125%7D%7B2%7D%3D1562.5%7D)
<u>Step-by-step explanation:</u>
a₁, 375, a₃, a₄, 81
First, let's find the ratio (r). There are three multiple from 375 to 81.
![375r^3=81\\\\r^3=\dfrac{81}{375}\\\\\\r^3=\dfrac{27}{125}\qquad \leftarrow simplied\\\\\\\sqrt[3]{r^3} =\sqrt[3]{\dfrac{27}{125}}\\ \\\\r=\dfrac{3}{5}](https://tex.z-dn.net/?f=375r%5E3%3D81%5C%5C%5C%5Cr%5E3%3D%5Cdfrac%7B81%7D%7B375%7D%5C%5C%5C%5C%5C%5Cr%5E3%3D%5Cdfrac%7B27%7D%7B125%7D%5Cqquad%20%5Cleftarrow%20simplied%5C%5C%5C%5C%5C%5C%5Csqrt%5B3%5D%7Br%5E3%7D%20%3D%5Csqrt%5B3%5D%7B%5Cdfrac%7B27%7D%7B125%7D%7D%5C%5C%20%5C%5C%5C%5Cr%3D%5Cdfrac%7B3%7D%7B5%7D)
Next, let's find a₁
![a_1\bigg(\dfrac{3}{5}\bigg)=375\\\\\\a_1=375\bigg(\dfrac{5}{3}\bigg)\\\\\\a_1=125(5)\\\\\\a_1=625](https://tex.z-dn.net/?f=a_1%5Cbigg%28%5Cdfrac%7B3%7D%7B5%7D%5Cbigg%29%3D375%5C%5C%5C%5C%5C%5Ca_1%3D375%5Cbigg%28%5Cdfrac%7B5%7D%7B3%7D%5Cbigg%29%5C%5C%5C%5C%5C%5Ca_1%3D125%285%29%5C%5C%5C%5C%5C%5Ca_1%3D625)
Lastly, Use the Infinite Geometric Sum Formula to find the sum:
![S_{\infty}=\dfrac{a_1}{1-r}\\\\\\.\quad =\dfrac{625}{1-\frac{3}{5}}\\\\\\.\quad =\dfrac{625}{\frac{2}{5}}\\\\\\.\quad = \dfrac{625(5)}{2}\\\\\\.\quad = \large\boxed{\dfrac{3125}{2}}](https://tex.z-dn.net/?f=S_%7B%5Cinfty%7D%3D%5Cdfrac%7Ba_1%7D%7B1-r%7D%5C%5C%5C%5C%5C%5C.%5Cquad%20%3D%5Cdfrac%7B625%7D%7B1-%5Cfrac%7B3%7D%7B5%7D%7D%5C%5C%5C%5C%5C%5C.%5Cquad%20%3D%5Cdfrac%7B625%7D%7B%5Cfrac%7B2%7D%7B5%7D%7D%5C%5C%5C%5C%5C%5C.%5Cquad%20%3D%20%5Cdfrac%7B625%285%29%7D%7B2%7D%5C%5C%5C%5C%5C%5C.%5Cquad%20%3D%20%5Clarge%5Cboxed%7B%5Cdfrac%7B3125%7D%7B2%7D%7D)