Answer:
this might help better
Step-by-step explanation:
5√24
=10√6(Decimal: 24.494897)
1 1/2? I pretty sure this is the answer.

take the derivitive to find the slope


so at x=1, the slope is f'(1)=6(1)^2-4=6-4=2
y=mx+b
y=2x+b
find b
at x=1, f(1)=2(1)^3-4(1)=2-4=-2=y
-2=2(1)+b
-2=2+b
-4=b
equation is y=2x-4
Find how much Neil traveled.
Since 20 minutes is a 1/3 of an hour, we need to find a 1/3 of 45 kilometers.
45/3= 15
So, Neil drove 15 kilometers.
Stephen was driving at 30 kilometers an hour.
30/2= 15
Stephen traveled for half an hour or thirty minutes.
I hope this helps!
~kaikers