Answer:
c
Step-by-step explanation:
A Roth 401(k) plan takes money after tax has been removed from gross income, and has a contribution limit, but withdrawal is tax free.
As the directrix is parallel to x-axis, the concavity of the parabola will be in vertical. Then, the general equation is in the form:
, where
are the coordinates of the vertice and p is the parameter (distance between the focus and the directrix). The parameter is
. The vertice is the midpoint between the focus and the projection of the focus in the directrix. Then, the vertice is
. Hence, the parabola is:
Now, derivating:
737 miles per 11 hours
737:11 is the ratio of distance to time
so the other ratio we have is
603:x, x is missing
we assume the ratios to be equal so
737:11=603:x
fractionify
737/11=603/x
multiply both sides by 11x
737x=6633
divide both sides by 737
x=9
answer is 9 houurs