The two cylinders are similar. Find the surface area of the smaller cylinder. Round your answer to the nearest hundredth. A. 942.48 cm²
B. 376.99 cm²
C. 565.49 cm²
D. 226.19 cm²

D

Step-by-step explanation:

To first tackle this question, use similarity ratio, where the missing diameter is d. 10/15 = d/9 which can be simplified into d = 6. Then use the surface formula  

2πrh + 2πr². Then, since the radius is 0.5d, the radius or r is 3. Then, plus in values and simplify to get 226.19cm².

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

can you put the picture up?

step-by-step explanation: