(04.01)the martinez family walked of a mile in of an hour. what equation can be used to calculate their unit rate in miles per hour?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

Acarton of juice contains 64 ounces miss wilson bought six cartons of juice how many ounces of juice did she buy

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?