Answer:
17
Step-by-step explanation:
Final Answer: 
Steps/Reasons/Explanation:
Question: Which expression is equivalent to 
<u>Step 1</u>: Expand by distributing terms.
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× 
<u>Step 2</u>: Simplify
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to
.
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<u>Step 3</u>: Simplify
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to
.

<u>Step 4</u>: Remove parentheses and add.

~I hope I helped you :)~
Solve for m:C = 1/3 π d^2 m
C = 1/3 d^2 m π is equivalent to 1/3 d^2 m π = C:1/3 π d^2 m = C
Divide both sides by (π d^2)/3:Answer: m = (3 C)/(π d^2)