Which function has real zeros at x = 3 and x = 7?

You invested $5000 between two accounts paying 4% and 9% annual interest, respectively. if the total interest earned for theyear was $350, how much was invested at each rate? $was invested at 4% andwas invested at 9%.

What is a possible solutions of the x> 3?

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?