Chris and amy leave from work and drive in different directions. their paths are at a 90-degree angle from one another, as shown in the following illustration. chris is traveling at 40 mph. amy leaves two hours later and is traveling at 60 mph. assuming that t represents the time that chris has been driving, which of the following equations can be used to calculate the values of t for which the distance between chris and amy is 300 miles? a.) square root (40t)^2-[60(t-2)]^2=300 b.) square root (40t)^2+[60(t-2)]^2=300 c.) square root (40t)^2+[60(t+2)]^2=300 d.) square root (60t)^2+[40(t-2)]^2=300