Fine x and y alpha ln trigonometry ln triangles​

What function has a range {yly< 5}? question on picture above^

Need same math paper but the back now i hope your able to read it cleary i need with hw

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?