Help with my math test please

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.