Antonio measures items in his pocket he knows there are 50 millimeters in 5 centimeters his key chain is 3.5 centimeters long his libairy card is 80 millimetes long

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Question and answers are in the attached picture. you so much in advance.

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?