Question 110376
option 1. {{{C = 4x + 35}}}
option 2. {{{C = 6.5x}}}
when is the cost for option 1. less than cost for option 2.?
{{{4x + 35 < 6.5x}}}
{{{35 < 2.5x}}}
{{{x > 14}}} hrs/mo. answer
The way to test this is try x = 14.01 and plug this into the two
original equations. Option 1. should still be cheaper.
Then try x = 13.99. Now option 1. should be slightly greater than 
option 2.