I need help ASAP. Thank you.

How long would it take for a ball dropped from the top of a 576-foot building to hit the ground? round your answer to two decimal places.

Oscar and julie ashton are celebrating their 15th anniversary by having a reception hall. they have budgeted $4,500 for their reception. if the reception hall charges a $90 cleanup fee plus & 36 per person, find the greatest number of people that they may invite and still stay within their budget.

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10