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Semenov [28]
3 years ago
11

2. Find the surface area of a cylindrical can of tennis balls if the height of the can is 8

Mathematics
2 answers:
alina1380 [7]3 years ago
7 0

Answer:

125.7 square inches

Step-by-step explanation:

The surface area of a cylinder is the sum of the areas of the two circles on each end and the area encircling "rectangle". Note that the length of this "rectangle" is the height of the can, while the width is the perimeter of the circle. The full equation is:

A=2 \pi r^2 +2 \pi r h\\A=2 \pi r(r+h)\\A=2 \pi (2)(2+8)\\A=40 \pi\\A=125.7

erik [133]3 years ago
6 0

Answer:

the surface area of the cylinder is 125.6

the formula is 2πrh+2πr^2

so plugging in all the parts it would be

2*3.14*2*8+2*3.14*2^2 which equals

125.6

Step-by-step explanation:

hope this helps you out :)

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1 285 watts

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Obligatoire

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If you're wondering how I did the long division, what I essentially did was get the first value (at the start, it was 3x^4) and divided it by the first value of the divisor (which in x+2 was x) to get 3x^3 in our example. I then subtracted the polynomial by the whole divisor multiplied by, for example, 3x^3 and repeated the process.

For this to be a perfect factor, (x+2)*something must be equal to (22+c)x-2. Focusing on how to cancel out the 2, we have to add 2 to it. To add 2 to it, we have to multiply (x+2) by 1. However, there's a catch, which is that we subtract whatever we multiply (x+2) by, so we have to multiply it by -1 instead. We still need to cross out (22+c)x. Multiplying (x+2) by -1, we get
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3 years ago
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