Question 281486
rt=d
We are forming a right triangle. 
The distances traveled by the car and truck form the legs of the right triangle.
The distance apart is the hypotenuse.
(70t)^2+(40t)^2=d^2
6500*t^2 = d^2
d=sqrt(6500t^2)
d=10sqrt(65)*t=80.62t
Without knowing the time we can't give the distance d
We are not given the time in numbers so we can't find the distance in numbers.
but it will be about 80.62 *t not just 80.62.