Answer:
Step-by-step explanation:
For this case we can define the random variable of interest as: "The nicotine content in a single cigarette " and for this case we know the following parameters:

And for this case we select a sample size of n =100 and we want to find the following probability:

And for this case we can use the z score formula given by:

And replacing we got:

And we can find the required probability with the normal standard table and we got:

Answer:
D)35
Step-by-step explanation:
14%4=3.5
3.5×10=35
Answer:
Step-by-step explanation:

So in order the trinomial a perfect square we need

When n is equal to this number that we have

Answer:
Omar saved 10 dollars in total
Step-by-step explanation:
total= 2.5*4
total= $10
Answer:
Option B: 1.15($45) is the correct answer.
Step-by-step explanation:
Given that:
Total amount of restaurant bill = $45
Tip = 15%
As the bill would be 100% and a 15% tip will be added.
Thus total bill,
Total bill = (100+15)% = 115% of restaurant bill
Total bill = 
Total bill = 1.15($45)
Hence,
Option B: 1.15($45) is the correct answer.