To settle a $770 invoice, Anna can pay $760 now or the full amount 45 days later.

a. Which alternative should she choose if money can earn 9 3/4%

multiple choice

a - Pay $760 now

b - Pay full amount 45 days later

b. What rate would money have to earn for Anna to be indifferent between the alternatives? (Use 365 days a year. Do not round intermediate calculations and round your final answer to 2 decimal places.) Rate ______ %