Name the number property illustrated by this equation: 4.78+(2.5+12.66)=4.78+(12.66+2.5) pleaese show your work or explain

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Math it's appreciated. (picture provided)

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?