Answer:
The correct option is D.
Step-by-step explanation:
The slope of a line is the change in y with respect to x.

If the slope of a line is undefined it means it is a vertical line and a vertical line  can not passes through three quadrants. So, option A is incorrect.
If the slope of a line is 0 it means it is a horizontal line and a horizontal line  can not passes through three quadrants. So, option B is incorrect.
If the slope of a line is positive it means the value of y increases as x increases.
Since it is an increasing line, therefore after a certain period both x and y will positive. It means the line will passes through first quadrant. So, option C is incorrect.
If the slope of a line is negative it means the value of y decreases as x increases. It can passes through each of Quadrants II, III, and IV.
Therefore the correct option is D.
 
        
             
        
        
        
It would be 256 because you would do 4 to the power of 4
        
             
        
        
        
3⁹ is the same as doing:
3 * 3 * 3 * 3 * 3 * 3 * 3 * 3 * 3
What I would do it is narrow it down piece by piece. 
3 * 3 * 3 = 27. Do that 3 times, now you are left with:
27 * 27 * 27
27 * 27 or 27² = 729.
That leaves you with:
729 * 27
You can multiply by hand or use a calculator to get your answer of 19683.
To check your answer, plug 3⁹ into a calculator. Your answer should match this. 
        
             
        
        
        
18,446,744,073,709,551,615 pennies
        
                    
             
        
        
        
Answer:

Step-by-step explanation:
AC is the geometric mean.  Solve it using this proportion:

Now fill in the values we know:

Cross multiply to get

That means that 
AC =  , which, in decimal form is
, which, in decimal form is
AC = 11.40175425