Simplify the following by combining like terms: 10 + 7r+b-4r* 10+ 3r
O 10 + 3r + b
O 13r + b

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step-by-step explanation:

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

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step-by-step explanation:

this is a parabola.