Can someone check if its right y

Which matrix multiplication is possible?

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00