Answer:

Step-by-step explanation:
The firm tests 75 parts, and finds that 0.25 of them are notusable
n = 75
x = 0.25 \times 75 = 18.75≈19



Confidence level = 95%
So, Z_\alpha at 95% = 1.96
Formula of confidence interval of one sample proportion:


Confidence interval 
I got 12 because each time you are dividing the number in half. Half of 24 is 12.
Answer:
$3 for 1 book.
Step-by-step explanation:
36. You can search it up and look at a times table chat or you can do this 6x5=30+6=36
Answer:
Pro: Monthly income to pay bills, buy food ,etc
Con: You many feel tied down, you could get abused at work (taken advantage of)