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TooNashty
The answer is D) 1400 hours

To check our work, substitute 1400 for x in the equation
After doing so we get y=($0.1)(1400) + $3.63; where Y= $143.63
After multiplying 1400 and $0.1, we get $140
$143.63 = $140 + $3.63
$143.63 = $143.63