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riadik2000 [5.3K]
3 years ago
13

Answer asap please and thank you

Mathematics
2 answers:
nadya68 [22]3 years ago
4 0

Answer:

you need to multiply the numbers

Step-by-step explanation:

1/5 ×2/5= 2/25

exis [7]3 years ago
4 0

Answer:

use X

Step-by-step explanation:

I'm kind of skeptical because none of them seem right to me, but X would be the one that makes more sense.

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Related rates(calculus)
telo118 [61]

Answer:

The volume increases at a rate of 125663.71 mm^ 3 / s

Step-by-step explanation:

The rate of change of the radius with respect to time is 4 mm / s.


So:


\frac{dr}{dt} = 4mm / s

Now we must find a relationship between the volume of a sphere and its radius.


The equation of the volume of a sphere is:


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\frac{dV}{dt} = \frac{4}{3}\pi * 3r ^ 2 * \frac{dr}{dt}\\\frac{dV}{dt} = 4\pi r ^ 2 * 4\\\frac{dV}{dt} = 16\pi r ^ 2

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\frac{dV}{dt} = 16\pi (50) ^ 2\\\frac{dV}{dt} = 40000\pi mm^3 / s


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