Answer:
72°
44°
Step-by-step explanation:
a circle=116° those are the measures
200 / 8 = 25
scale factor is 1:25 or 0.04
Answer:
The answer is 1.35 answer (1). You can graph both equations to give you the answer.
Step-by-step explanation:
Graph the equations and see where they intersect.
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Answer:
![\dfrac{dV}{dt}=502.65\ mm^3/s](https://tex.z-dn.net/?f=%5Cdfrac%7BdV%7D%7Bdt%7D%3D502.65%5C%20mm%5E3%2Fs)
Step-by-step explanation:
The volume of a sphere is given by :
![V=\dfrac{4}{3}\pi r^3](https://tex.z-dn.net/?f=V%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20r%5E3)
The rate of change of volume means,
![\dfrac{dV}{dt}=\dfrac{d}{dt}(\dfrac{4}{3}\pi r^3)\\\\\dfrac{dV}{dt}=\dfrac{4}{3}\pi \times 3r\times \dfrac{dr}{dt}](https://tex.z-dn.net/?f=%5Cdfrac%7BdV%7D%7Bdt%7D%3D%5Cdfrac%7Bd%7D%7Bdt%7D%28%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20r%5E3%29%5C%5C%5C%5C%5Cdfrac%7BdV%7D%7Bdt%7D%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20%5Ctimes%203r%5Ctimes%20%5Cdfrac%7Bdr%7D%7Bdt%7D)
We have, ![\dfrac{dr}{dt}=2\ mm/s\ and\ r=40\ mm](https://tex.z-dn.net/?f=%5Cdfrac%7Bdr%7D%7Bdt%7D%3D2%5C%20mm%2Fs%5C%20and%5C%20r%3D40%5C%20mm)
So,
![\dfrac{dV}{dt}=\dfrac{4}{3}\pi \times 3\times 20\times 2\\\\=502.65\ mm^3/s](https://tex.z-dn.net/?f=%5Cdfrac%7BdV%7D%7Bdt%7D%3D%5Cdfrac%7B4%7D%7B3%7D%5Cpi%20%5Ctimes%203%5Ctimes%2020%5Ctimes%202%5C%5C%5C%5C%3D502.65%5C%20mm%5E3%2Fs)
So, the volume is increasing at the rate of
.