3 years ago

What are the last non-zero digits of 2015! ?

Mathematics

1 answer:

kykrilka [37]3 years ago

6 0

15? Those are the digits after 0.

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A cylinder has a surface area of 5652 square millimeters. If the diameter of the cylinder is 30 millimeters, what is the height?

o-na [289]

The formula for the surface area of a cylinder is:

$\sf A=2\pi rh+2\pi r^2$

Plug in what we know, use 3.14 to approximate for pi(radius is half the diameter, 30/2 = 15):

$\sf 5652\approx 2(3.14)(15)h+2(3.14)(15)^2$

Simplify:

$\sf 5652\approx 94.2h+1413$

Subtract 1413 to both sides:

$\sf 4239\approx 94.2h$

Divide 94.2 to both sides:

$\boxed{\sf h\approx 45~mm}$

So the height is approximately 45 millimeters.

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3 years ago

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Gelneren [198K]

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Step-by-step explanation:

38200 would represent the debt, 400m would be the amount he puts into it every month. 800 must be the bonus because it doesn't have a variable and is added to the monthly amount.

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