Answer:B is the answer
Step-by-step explanation:
TRUSt
You just need pythagorean theorem c=a2+b2=72+42≈8.06226
1/10 of 30000 is 3000 because 30000 divided by 10 is 3000.
The money is taken per hour of work and 125 is the amount taken per hour of work
and when multiplied by .095 gives the amount extra he has to pay(for the tax)
To solve this (assuming that you mean simple interest) you need to first know the formula for exponential growth witch is S(1+(-)I)

so with all of are numbers inputed it looks something like this 800(1+.0425)

because,
S=starting amount, I=interest rate, and T=Time (amount of time that goes by)
back to the equation it would equal 1027 (rounded to the nearest dollar)
Enjoy!=)