A rocket is launched with an initial velocity of 107 feet per second from the top of a cliff 63 feet high. Its height is described by h(t)= -16t^2 + 107t+63 How long will the rocket take to hit the ground?

Abank manager wants to encourage new customers to open accounts with principals of at least $2 comma 500. he decides to make a poster advertising a simple interest rate of 3%. what must the principal be if the bank manager also wants to advertise that one can earn $10 the first month? can the poster correctly say, "open an account of $2 comma 500 and earn at least $10 interest in 1 month! "?