The functions each model the number of students S is that played an online video game d days after each video game was released. S^1(d)= 0.45d^3-3d^2 + 4.75d +16
S^2(d)=0.09d^3-1.31d^2 +7.25d +18
Use a graphing calculator to determine the number of days after the games release that were played by the same number of students.