Math! . really don't understand this one!

little miss buffet takes all the money from her piggy bank and puts it into a savings account at her local bank. the bank promises an annual interest rate of 3% on the balance, compounded semiannually. how much will she have after one year if her initial deposit was $400?

$529.00

$412.17

$2,500.00

412.09

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2