Please help. ;A; im really bad at math and i cant figure this one out.

Tricia uses the Fermi process to estimate the number of buckets of sand she could store in a warehouse. The buckets are shaped like cylinders. The warehouse is shaped like a rectangular prism.

• She estimates the buckets have a height of 15 inches and a diameter of 20 inches.
• She estimates the warehouse is 250 feet long, 80 feet wide, and 20 feet high.

Which expression should Tricia use in the process?

 

​ 5×1075×104 ​

​ 7×1085×103 ​

​ 5×1065×103 ​

​ 7×1095×104 ​