If she cuts it then the angle would become a right angle so it sould be 90º
Answer:
-31
Step-by-step explanation:

i got what he got , If c is cost and X is the item, c=x-.12 or c=x*.88
Where is the model. To answer I need the model.
Answer:
Sample size should be atleast 617
Step-by-step explanation:
given that a 95% confidence interval for the mean of a population is to be constructed and must be accurate to within 0.3 unit.
i.e. margin of error <0.3
Std devition sample = 3.8
For 95% assuming sample size large we can use z critical value
Z critical = 1.96
we have

Sample size should be atleast 617 to get an accurate margin of error 0.3