Which expression is equivalent to 9 x 9 x 9 + 12 x 12 x 12?

Tina practice piano for 15 hours last month and 45 hours this month use multiplication to write a statement comparing me i was tina practice during the two months use addition to write a statement comparing the hours tina practice during the two months

How do you find principle and simple interest

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15