Todd travels frequently for his business. For tax reasons he wants to use up all of the remaining money in his business travel fund this year. He uses the function f(x) = x2 - 8x + 16 to determine how many trips he must take to spend all of his remaining business travel funds. In this function, x represents the number of trips and f(x) is the amount of money lefft in his fund after the trips. The discriminant of this quadratic function tells us that this quadradit equation has real zero solution(s)