Timed. Don't take longer than an hour to answer. Written explanation not needed. Only correct work.

7. Find the exact values of the following logarithms a) 10g3 81 b) log17 c) In e 25678. Anna invested $12,000 in a bank account that pays 4.6% annual interest compounded monthly. She will let the interest re invest in the account and not make any changes for the next 20 years. a) How much money will she have in this account after 10 years? b) After how many years will she have $20,000 in this account