Answer:
$77.12
Step-by-step explanation:
72.75*0.06 which is 77.12.
Hope this helps plz mark brainliest :D
Answer:
6.75
Step-by-step explanation:
3/4= 0.75, 6+ 0.75= 6.75
1/4= 0.25, 1/4x3=0.25x3 or 0.25+0.25+0.25= 0.75
I'll do one, you can use it as a basis for your answer.
Subtract 6 from both sides to get X by itself.
Now we divide by 7 for both sides as well.
Now we find the square root of 1 to figure out X.
Therefore, X=1.
my first answer in about a month. hope this helped.
Answer:
a)
b) n = 381
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of .
The margin of error is:
90% confidence level
So , z is the value of Z that has a pvalue of , so .
a. Assume that nothing is known about the percentage of computers with new operating systems. n = ?
When we do not know the proportion, we use , which is when we are going to need the largest sample size.
The sample size is n when M = 0.01.
b. Assume that a recent survey suggests that 99% of computers use a new operating system. n = ?
Now we have that . So
Rouding up
n = 381