Allyson and Adrian have decided to connect their ankles with a bungee cord; one end is tied to each person's ankle. The cord is 30 feet long, but can stretch up to 90 feet. They both start from the same location. Allyson moves 20 ft/sec and Adrian moves 12 ft/sec in the directions indicated. (If a coordinate system is used, assume that the girls' starting position is located at (x, y) = (0, 0) and that Allyson and Adrian move in the positive y and negative x directions, respectively. Let one unit equal one foot.)

Question

Allyson and Adrian have decided to connect their ankles with a bungee cord; one end is tied to each person's ankle. The cord is 30 feet long, but can stretch up to 90 feet. They both start from the same location. Allyson moves 20 ft/sec and Adrian moves 12 ft/sec in the directions indicated. (If a coordinate system is used, assume that the girls' starting position is located at (x, y) = (0, 0) and that Allyson and Adrian move in the positive y and negative x directions, respectively. Let one unit equal one foot.) 
(a) Where are the two girls located after 2 seconds?
Allyson (x,y)
Adrian (x,y)
(c) Determine when the bungee cord first becomes tight; i.e., there is no slack in the line this = 1.3 sec
Where are the girls located when this occurs? (Round your answers to one decimal place as needed.)
Allyson (x,y)
Adrian (x,y)
can anyone help me

oobleck · Answer

As I told you 8 hours ago, cannot access files on your computer. But, clearly, after t seconds, Allyson is at (0,20t) Adrian is at (-12t,0) so plug in t=2 or 1.3

Matt · Answer

well it says that Allyson is at (0,20t) Adrian is at (-12t,0) is wrong

oobleck · Answer

how does starting at (0,0) and moving north at 20 ft/s not put Allyson at (0,20t) after t seconds? Something's wrong here. At t=2, Allyson must be at (0,40)