Write out the sum.
A. 52 + 53 + 54 + ... + 5n
B. 5 + 52 + 53 + ... + 5n
C. 5 + 52 + 53 + ... + 5n+1
D. 52 + 53 + 54 + ... + 5n+1
Answer: D
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and 
. If AB = 16, BC = 12, and BH = 14, find the length of altitude 
to side .
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