Not sure how many significant figures are needed....
0.41
6 (the 6 is terminating)0.41
0.40

x
The interest is: $2730.00
Step-by-step explanation:
I used a calculator
The answer would be 18
Hope that helps.


Explanation:
Let Number of $45 shares be x
Let number of $ 25 shares be 3x-25
According to question,

So,


<span>Mean = 270
Standard deviation = 10
x = 255
Formula for z-score, z = (x - mean)/SD
z = (255 - 270) / 10
=> z = -15 / 10 => z = -1.5
So by referring to z-table, -1.5 correlates to 0.0668 that implies to 0.07
So 7% of the boxes of Apples weight less than 255oz.
The percentage of boxes is in the range of 255 oz and 270 oz,
Now calculating the requiring percentage 50% - 7% = 43%</span>