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.
The total amount of rain is 28.8 inches over 12 months. To find how much rain falls averagely in <em>one </em>month you need to divide the total by the amount of months. 28.8/12 = 2.4
