Can someone me with this question?

Given f(t) = 282 - 53 +1, determine the function value f(2). do not include f(z) = in your answer

If there is no real number solution to the quadratic equation x^2+2x+c=0 what is a possible value of c? 1 -2 0 3

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.