Sally opens a bank account with $500. the account accrues 5% interest compounded annually. how much money will she have in her account at the end of 4 years? (use the formula a=p(1+rn)nt , where p = initial amount of money, r = interest rate, t = the number of years, and n = number of times the interest is compounded per year.) (round to the nearest cent)

(it is 24 points)

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.