If their call lasts 11 minutes the cost will be the same
Poor <span>Khianna. Let's help her out.
For the original recipe she needs </span>

cups of brown sugar but only has

So the fraction of the brown sugar she has is

She has to scale everything by a factor of

I won't multiply everything by 3/4 for you. 2 cups butter becomes 1 and a half cups butter, 1 tsp vanilla becomes 3/4 tsp, etc.
I believe it is 2 because, 0.4 is added on to 2. 2.7 is basically 2.70 making it 0.70 bigger than 2.
I hope this helped
First step=
we need to find time for i mile
which is
75/3000=1/40
then to find for 4000 miles we multiply that by 4000
which is 1/40x4000
cancel zeros
1/4x400
=100 hours for 4000 miles