1. The annual salary of Tristan = $33907
So, his monthly salary becomes =

Semimonthly means he is paid twice in a month so his each paycheck will have the amount =

Hence, option C is the answer.
2. The cost of the meal = $75.77
Tip percent = 25%
So, amount of the tip is =

Hence, option B is the answer.
3. Rate of commission = 0.045
Equation becomes = 11.25t+0.045S (S is sales)
Putting 35 in t we get ,
P(35)=11.25(35)+0.045(4000)
= 393.75+180 = 573.75
Hence, option C is the answer.
4. Total money earned for working 40 hours=

The social security tax is 6.2% of the gross pay, it becomes
or 38.69
Hence, option D is the answer.
5. Total deductions are 472.05 - 296.15 = $175.90