Liam opened a savings account with a $400 deposit and a simple interest rate of 7.5%. If the balance of the account is now $670 and there were no deposits or withdrawals, how long ago did he open the account?

Answer this 30 points and brainliest!

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount