9 dollars an hour is variable dependent on the number of hours, hence it has to be 9h. That means if you work 1 hour, it’s 9 * 1 = 9, 2 hours is 9 * 2 = 18, etc...
A $15 tip each day does not depend on anything; it’s a constant. That means it would just be + 15.
So now you have 9h + 15.
If it says she made no less than $110, it means that she can make $110 and any amount above it. So it would be whatever she makes is greater or equal to 110.
Hence your final answer is c).
