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Answer:
the answer is 15 I just took the assessment
Answer:

- Firstly you need to remember the formula to find out surface area of a cylinder - Surface area of a cylinder = 2πr ( r + h ) where r is the radius of a circular face and h is the height of the cylinder.
- We're provided : Diameter of cylinder = 12 which means radius ( r ) = 6 cm [ Radius is the half of diameter ] & Height ( h ) = 25 cm & we know pi ( π ) = 22/7.


- Plug the values & then simplify !



- Hence , The surface area of given cylinder is 1169.14 cm²
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B, raise 10 to the power of both sides of the equation, and when you have 10^log(x), it just becomes x, so 10^a=10^log(987)=987
I can't see the picture clearly sorry I wish I can help…