20 1/2= 4 hours
20 1/2÷4= 5 1/8 1 hour
for 9 hours = 5 1/8×9
=46 1/8
Earnings = Sales * Profit margin = 7200 * 4% = 288
Price to earnings = stock price / earnings per share = 1.40/(288/6000) = <span>$29.17</span>
The answer is B) (6,-8.75).
The general form of the quadratic equation is :

The discriminant is :

And the general solution is :
![x=\frac{-b\pm\sqrt[]{D}}{2\cdot a}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B-b%5Cpm%5Csqrt%5B%5D%7BD%7D%7D%7B2%5Ccdot%20a%7D)
So, there are 3 situations for D
1. D = 0
So, the roots of a quadratic equation are two similar roots
2. D > 0
so, roots of a quadratic equation are two different roots
3. D < 0
so, roots of a quadratic equation are not real, two comlex roots
1/6 I think i might be wrong