Acloset contains 5 short-sleeve shirts and 3 long-sleeve shirts. two shirts are chosen from the closet without looking. what is the probability that both shirts have short sleeves? a: 9/64 b: 3/28 c: 5/14 d: 25/64

D. There is a 5/8 chance each time. You would multiply that together to get the answer seen in D. 

If x is representing the number of hours he has been climbing, and y represents the total number of feet, then the answer is D: -325. It is stated in the question that he started below sea level, so the answer cannot be A or B, as they are both above sea level. Then, to see at what elevation he started, plug x+0 into the equation. 850x will become 0, and y=-325.