The height, in feet, of an object projected upward is given by the polynomial −16t^2+60t+90 where t represents time, in seconds. Find the height after t=2.5 seconds.

Let d be the domain and let ƒ be the possible function. determine if the relation is an example of a function. d = {x| x is a date, expressed in day/month/year} ƒ(x) = temperature in seattle washington on that date