The surface area of a cylinder with circular bases of radius <em>r</em> and height <em>h</em> is equal to the sum of the areas of the two circular faces and the area of the rectangular lateral surface:
<em>A</em> = 2π<em>r</em>² + 2π<em>rh</em>
If you know the height <em>h</em>, then you can solve the quadratic equation for <em>r</em>.
Answer:C 5a^2 +70a +240
Step-by-step explanation:
Answer:
6 and 3
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Answer:
I would say try D and then try A
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THE ANSWER IS D 8 BECAUSE I DID THE MATH