Each problem is worth 10 points each. (For each problem show your work and give a brief explanation of how you solved your problem.) There are 5^12 blades of grass in each acre of land, and a section of land has 5^7 acres of land. How many blades of grass does the land have? Leave your answer in the for a^b and simplified form.

A swimming center builds a new pool that has the dimensions 3a^6 by a^2 by b^4. What is the volume of the pool?