Need help will give brainliest plz

Which matrix can be multiplied to the left of a vector matrix to get a new vector matrix ?

Myron put $5000 in a 2-year cd playing 3% interest, compounded monthly. after 2 years, he withrew all his money. what was the amount of the withdrawal?

Me! last question, and i'm stuck! write the algebraic expression that models the word phrase. the product of 2 divided by the number h and 8 more than the number k