SOLUTION: what is the sum of the unique prime factors of 280? a. 10 b. 11 c. 12 d. 13 e. 14

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Question 1205617: what is the sum of the unique prime factors of 280?
a. 10
b. 11
c. 12
d. 13
e. 14
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

280=2%5E3%2A5%2A7
there are 5 prime factors, but 3 distinct
the sum of the unique prime factors is 2%2B5%2B7=14
answer:
e. 14