Answer:
12 sec
Step-by-step explanation:
After 1 sec distance between the deer and the bear = (8 + 5) = 13 feet.
After x sec distance is 13x.
13x = 156
x= 156/13=12 sec
A n s w e r:
0 ≤ x < 4
-3x(7x+8)
-3x^2-18x^2-24x
-3x(x+6x+8)