Mathematics: What is the surface area of the cone?

35/100* 800=35*800/100 this is the equation...

What is the surface area of the cone? - id13976217, tylorroundy

Ответ:

itscheesycheedar

21.08.2021

Step-by-step explanation:

To find the surface area of a cone, you use the formula $A=\pi r(r+\sqrt{h^2+r^2} )$ . Since we are already given the height and radius, all we have to do is plug in the values and solve.

$A=9\pi (9+\sqrt{41^2+9^2} )$ [solve inside of square root]

$A=9\pi (9+\sqrt{1762} )$ [parenthesis]

$A=9\pi (50.976 )$ [multiply]

A=458

Therefore, the closest answer is C.

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