3 years ago

I need help on this....

Mathematics

2 answers:

GuDViN [60]3 years ago

4 0

Answer:

Only the last one will take 3 hours.

NemiM [27]3 years ago

3 0

Answer:

the last one

Step-by-step explanation:

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The radius of a sphere is increasing at a rate of 2 mm/s. How fast is the volume increasing when the diameter is 100 mm?

Advocard [28]

Answer:

Volume increasing rate = $62831.85 mm^3/s$

Explanation:

We rate of change of radius of sphere, $\frac{dr}{dt} =2mm/s$

Diameter of sphere = 100 mm

Radius of sphere = 50 mm

Volume of sphere, V = $\frac{4}{3} \pi r^3$

Rate of change of volume = $\frac{dV}{dt}$

$\frac{dV}{dt}=\frac{d}{dt} (\frac{4}{3} \pi r^3)=\frac{4}{3} \pi\frac{d}{dt}(r^3)=\frac{4}{3} \pi*3r^2*\frac{dr}{dt}$

Substituting known values

$\frac{dV}{dt}= \frac{4}{3}* \pi*3*50^2*2=62831.85 mm^3/s$

Volume increasing rate = $62831.85 mm^3/s$

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3 years ago

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RoseWind [281]

The answer to this is x=3

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2 years ago

How to find the all 4 angles of a trapezoid given only the side lengths

Lady_Fox [76]

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you have to add together all the numbers you where given then divide

Step-by-step explanation:

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2 years ago

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2 years ago

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Semenov [28]

So the volume of the cylinder = pi r^2 * h
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