Agrocer purchased a 100 pound mixture of nuts for 540 of the mixture contains 60 pounds of peanuts that cost 4 per pound the remains nuts in the mixture are almonds. what is the cost per pound of the almonds in the mixture?

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?