Answer:
Step-by-step explanation:
hello,
for t = 4 hours

this is 205 km
d is differentiable and

and

this is 136 km/h
d' is differentiable and

and

this is 
Plug it into the quadratic formula (you'll get two answers):
1. -12+-√12^2-4(3)(11)
_________________
2(3)
2. -12+-√12
________
6
3. -12+√12 and -12-√12
_______ _______
6 6
Greater=19
Smaller=3
Just use substitution
It's 28 bruh.. you don't know your multiplication table?
Answer: x=-12
Step-by-step explanation: Solve for x by simplifying both sides of the equation, then isolating the variable.
Hope this helps you out! ☺