A bird drops a stick from the top of a Miami tower. The height of the stick after x seconds is given by f(x)=625-16x^2. What is the maximum value of f(x)? 


A bird drops a cleave from the top of a Miami uprise. The top of the cleave following x seconds is ardent by f(x)=625-16x^2. What is the utmost estimate of f(x)?