Which equation should be used to solve the following word problem? Chris and Jessica both leave San Francisco at the same time. Chris travels north at 65 mph. Jessica travel south at 58 mph. How long will it take them to be 369 miles apart? A. 65 + 58 (t + 1) = 369

B. 65 + 58t = 369

C. 65(t - 1) + 58t =369

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?