Aboat can go 119 mph in still water. it takes as long to go 320 miles upstream as it does to go downstream 360 miles how fast is the current?

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.