Answer:
He must survey 123 adults.
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 z-score that has a p-value of
.
The margin of error is:

Assume that a recent survey suggests that about 87% of adults have heard of the brand.
This means that 
90% confidence level
So
, z is the value of Z that has a p-value of
, so
.
How many adults must he survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage?
This is n for which M = 0.05. So






Rounding up:
He must survey 123 adults.
Answer:
Does February March?.... NO, but APRIL MAY
Step-by-step explanation:
Does February March?.... NO, but APRIL MAY
Does February March?.... NO, but APRIL MAY
\Does February March?.... NO, but APRIL MAY
Does February March?.... NO, but APRIL MAY
Does February March?.... NO, but APRIL MAY
Does February March?.... NO, but APRIL MAY
Answer: 6.25 is her profit
Step-by-step explanation: cost-price= protect
2.25 - 8.50=6.25
Correct answer is C.
There are infinitely many possible paths between X and Y.