Answer:
15.81
Step-by-step explanation:
B is the answer to this question
Answer:

Step-by-step explanation:
The equation for a line is y=mx + b where m represents the slope
If a line is perpendicular to another line, it's slope is the negative reciprocal of the other line's slope.
The reciprocal of -4 is 
And the negative of that would be 
The answer for that is A. 40 cubic in