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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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The distance from Jason’s house to school is 0.5 km what is the distance in meters
valkas [14]

Answer:

500 meters

Step-by-step explanation:

1km=1000meters so 0.5km=500m

7 0
3 years ago
(HELP ASAP PLEASE!!)
olasank [31]

Answer:

Shirts = $7

Shorts $17

Step-by-step explanation:

Let:

T - shirts

S - shorts

We can make two equations out of this problem:

4T + 3S = $79

7T + 8S = $185

Through substitution we can solve for one of the unknowns. We make one equation to solve for an unknown

4T+3S=\$79\\\\3S = \$79-4T\\\\S=\dfrac{\$79-4T}{3}

We use the formula of S and insert it into the other equation:

7T+8(\dfrac{\$79-4T}{3}) = \$185\\\\7T + \dfrac{\$632-32T}{3}=\$185\\\\\dfrac{\$632-32T}{3}=\$185-7T\\\\\$632-32T=3(\$185-7T)\\\\$632-32T=\$555 - 21T\\\\-32T+21T=\$555-\$632\\\\-11T=-\$77\\\\\dfrac{-11T}{11}=\dfrac{-\$77}{11}\\\\T = \$7

Thus T-shirts are $7 each.

Now that we know T, we can use it to solve for the other unknown. You can use it on any of the formulas.

4T+3S=\$79\\\\4(\$7) + 3S = \$79\\\\\$28+3S =\$79\\\\3S=\$79-\$28\\\\3S=\$51\\\\S=\dfrac{\$51}{3}\\\\S = \$17

We know then that Shorts are $17 each.

7 0
3 years ago
ryan earns $5 for each small dog he walks and $8 for each latge dog he walks. today he walked 8 dogs and made a total of $55. ho
ad-work [718]

If we divide 55 (the total amount of money he made) by 5 (price to walk one small dog), we get 11. Meaning that the maximum amount of small dogs he could possibly walk and receive that amount of money is 11. However, he only walked 8 dogs. Therefore Ryan would have needed to walk a specific amount of large dogs in order to earn 55 dollars in total.

After doing some process of elimination, I reached this conclusion:

3 small dogs = $15

5 large dogs = $40

The combination of the two would equal $55.

Therefore, the answer would be 3 small dogs.

7 0
3 years ago
H (4, -8) is the pre-image. What is the new prime image after a dilation with a scale factor of 1/2?
Marina CMI [18]

Answer:

(2, -4)

Step-by-step explanation:

The scale factor is the number used to multiply the pre-image coordinates.

The image of the point (4, -8) is (2, -4).  Each coordinate is 1/2 the corresponding coordinate in the pre-image.

8 0
3 years ago
Helppp please :(((((
DedPeter [7]

Answer:

Step-by-step explanation:

6 0
3 years ago
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