Answer:
1st step would be to check to see if you can factor anything out:
Greatest Common Factor. This means the greatest number that you can divide EVERY term by.
Providing 1 mile is 5280 feet, then,

It will travel,

in 15 seconds.
Answer:
13,800,000
Step-by-step explanation:
You start off with 4*(cos(x+(pi/3)))
Let's place the 4 aside for the time being:
Cos(u+j) = cos(u)*cos(j) - sin(u)*sin(j)
cos(x+(pi/3)) = cos(x)*cos(pi/3) - sin(x)*sin(pi/3)
cos(x+(pi/3)) = cos(x)/2 - (sqrt(3)/2)*sin(x)
Multiplying by the 4 we put aside:
4*cos(x+(pi/3)) = 2*cos(x) - 2*sqrt(3)*sin(x)
The correct answer is B