Answer:
it would be 17.10 because .95 x 18 is 17.1 and 17.1 and 17.10 are the same
Step-by-step explanation:
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Hi,
Sorry i don't understand you "determine the sigma notation of the sum for term 4 through term 15"

Option 1: profit per hour = 8(1) - 10 = 8 - 10 = $(-2)
Option 2: profit per hour = 16(1) - 12 = 16 - 12 = $4
Option 3: profit per hour = 10(1) - 5 = 10 - 5 = $5
Option 4: profit per hour = 14(1) - 8 = 14 - 8 = $6
Therefore option 1 is the least profitable investment.