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skad [1K]
3 years ago
12

Please hurry What is the surface area of the cylinder? Express the answer in terms of pi.

Mathematics
2 answers:
jeyben [28]3 years ago
5 0
<h3> ♫ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ♫</h3>

➷ The formula for surface area of a cylinder is:

2\pi rh + 2\pi r^2

The radius is half the diameter

radius = 8/2 = 4

Substitute the values in:

2\pi (4)(18) + 2\pi (4)^2

Solve it:

surface area = 176\pi

<h3><u>✽</u></h3>

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

Alborosie3 years ago
4 0

Answer:

525.64 cm^{2}

Step-by-step explanation:

The formula is <em>S.A. =2\pi r^{2} + 2\pi rh </em>

write the equation out. *raduis is half of diameter, d=8. r=4)

2 x 3.14 x 4^{2} + 2 x 3.14 x 4 x 18 = <em>S.A. </em>

Solve

2 x 3.14 x 4^2 = 100.48

Rewrite

100.48 + 2 x 3.14 x 4 x 18 = <em>S.A.</em>

solve second halve

2 x 3.14 x 4 x 18 = 452.16

rewrite

100.48 + 425.16 = 525.64

525.64 cm^{2}

Hope this helped! Please mark as brainliest! Thanks!

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  • The sequence of transformations that maps triangle XYZ onto triangle X"Y"Z" is <u>translation 5 units to the left, followed by translation 1 unit down, and relfection accross the x-axis</u>.

Explanation:

By inspection (watching the figure), you can tell that to transform the triangle XY onto triangle X"Y"Z", you must slide the former 5 units to the left, 1 unit down, and, finally, reflect it across the x-axys.

You can check that analitically

Departing from the triangle: XYZ

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  • Vertex Z: (-2, 2) → (-2 -5, 2) = (-7, 2)

  • <u>Translation 1 unit down</u>: (x,y) → (x, y-1)

  • (-11,2) → (-11, 2 - 1) = (-11, 1)
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  • (-7, 2) → (-7, 2 - 1) = (-7, 1)

  • <u>Reflextion accross the x-axis</u>: (x,y) → (x, -y)

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Thus, in conclusion, it is proved that the sequence of transformations that maps triangle XYZ onto triangle X"Y"Z" is translation 5 units to the left, followed by translation 1 unit down, and relfection accross the x-axis.

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