Can someone explain what I did wrong?

a) In the equation [tex]\color{RawSienna}{SA\, =\, 4 \pi r^2 h,}[/tex] predict what will happen to SA if the radius is tripled and the height remains the same.

b) Prove your answer using actual values. In other words, pick test values to plug in and try, according to the stipulations in (a) above. Does your prediction hold true?

c) Create a summary or explanation that describes how to predict what will happen to one variable in an equation based on what happens to another variable. You may use specific examples to aid in your answer.

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