Answer: if you times 12x2.75 I got 33 some she can spend $33.00 and not go over.
        
             
        
        
        
Answer:
the excel that would be used to construct a confident interval estimate is (A) NORM.S.INV
Step-by-step explanation:
NORM>S>INV returns the of the standard normal cumulative distribution.
 
        
             
        
        
        
Answer: x = {-1, -3, 2}
<u>Step-by-step explanation:</u>
x³ + 2x² - 5x - 6 = 0
Use the rational root theorem to find the possible roots:  ±1, ±2, ±3, ±6
Use Long division, Synthetic division, or plug them into the equation to see which root(s) work <em>(result in a remainder of zero)</em>.
I will use Synthetic division.  Let's try x = 1
 1 |  1    2    -5     -6
   |<u>  ↓    1      3     -2 </u>       
      1     3    -2    -8   ← remainder ≠ 0 so x = 1 is NOT a root 
  Let's try x = -1 
- 1 |  1     2    -5    -6
    |<u>  ↓    -1     -1     6 </u>       
       1     1     -6     0   ← remainder = 0 so x = -1 is a root!
The coefficients of the reduced polynomial are: 1, 1, -6  -->   x² + x - 6
Factor: x² + x - 6
           (x + 3)(x - 2)
Set those factors equal to zero to solve for x:
x + 3 = 0   --> x = -3
x - 2 = 0    --> x = 2
Using Synthetic Division and Factoring the reduced polynomial, we found 
x = -1, -3, and 2