This is one of the many questions due tomorrow. what's the answer?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

The volume of the a sphere whoes diameter is 18 cm is cubic cm . if it's diameter were reduced by half, it's volume would be of its original volume

Jessica is organizing a guided tour of the rain forest. the average profit per person that the touring company makes is given by the rational expression 18x+35/x, where x is the number of people going on the tour. what does the numerator of this rational expression represents?