What equation can be used to find the length of AC (10)sin(40°)=AC (10)cos(40°)=AC 10/sin(40°)=AC 10/cos (40°)=AC

Chanelle deposits $7,500 into the bank. she does not withdraw or deposit money for 6 years. she earns 6% interest during that time. what will the balance be when she is finally able to withdraw her money?

Pls , the question is in the picture!

Oliver had $50 on the day before his birthday. after he recived some money for his birthday , he had $75. write and solve eqaution to find how much money oliver received for his birthday. x+50=75