Answer:
first of all, this person is a hacker, their malicious files will destroy your computer
Step-by-step explanation:
B is the answer I think
C because the x-axis and the y-axis are switched, basically.
Answer: 741
Step-by-step explanation:
As per given ,we have
The prior estimate of population proportion: 
Margin or error : 2.5%=0.025
Critical value for 95% confidence = 
Formula to find the sample size :-

i.e. 

Hence, the minimum sample size required to obtain this type of accuracy= 741
Sales price 5
Rate 100/250
Cost to make
5×(100/250)=2 each