If ∡2=98°, ∡3=23°, and ∡8=70°, find each measure. please hurry it would mean a lot :) <3 it's number 3 on the pic lol

Need on this geometry question. explain how you did it.

Which expression is equal to (f+g)(x)?

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?