Answer:
i)The correct option is  D.) 99.74%
ii) The correct option is B.) 68.26%
Step-by-step explanation:
i) P(10≤X≤70) = P(  (10−40)/10  ≤Z≤   (70−40
)/10 ) =  Pr(−3≤Z≤3)
 = 0.9987 - 0.0013 = 0.99734
 Therefore the percentage of Jen's monthly phone bills are between $40 and $100 is D.) 99.74%
ii)P(2.1≤X≤3.1) = P(  (2.1 − 2.6) /0.5   ≤ Z  ≤ (3.1−2.6
)/0.5)  =  Pr(−1  ≤Z  ≤1)
)
=  0.8413 − 0.1587  =  0.6826
Therefore the percentage of students at college have a GPA between 2.1 a,d 3.1 is B.) 68.26%
 
        
             
        
        
        
if the tins are shown like this:
TIN A: 2:3
TIN B: 4:5
TIN A: can also be shown as 4:6 
there for theirs is more blue in the first tin then second tin
 
        
                    
             
        
        
        
If the perimeters are equal, you can form an equation to find x:
x + x + 12 + x + x + 12 = x + 11 + x + 11 + x + 16
4x + 24 = 3x + 38
- 3x
x + 24 = 38
- 24
x = 14
Now you can substitute the x value into the perimeter:
(4 × 14) + 24
56 + 24 = 80 cm
(3 × 14) + 38
42 + 38 = 80 cm
So the perimeter would be 80 cm. 
I hope this helps!
        
             
        
        
        
Today is 3/14/17 and where is the content at