HELPS PLEASE. Lydia deposits $300 into an account that earns 3% interest, compounded semiannually. Calculate the amount in the account after one year. (Round your answer to the nearest cent)

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units