We need to find out how many adults must the brand manager survey in order to be 90% confident that his estimate is within five percentage points of the true population percentage.
From the given data we know that our confidence level is 90%. From Standard Normal Table we know that the critical level at 90% confidence level is 1.645. In other words, 
.
We also know that E=5% or E=0.05
Also, since, 
is not given, we will assume that =0.5. This is because, the formula that we use will have 
in the expression and that will be maximum only when =0.5. (For any other value of , we will get a value less than 0.25. For example if, is 0.4, then 
and thus, 
.).
We will now use the formula
We will now substitute all the data that we have and we will get
which can approximated to n=271.
So, the brand manager needs a sample size of 271
Answer:
9000. the value of 9 in 920 is 900. and ten times anything is basically just adding a 0. so ten times 900 is 9000.
Step-by-step explanation:
Please mark brainliest and have a great day!
Answer:
C. Perpendicular Lines
D. Intersecting Lines
Step-by-step explanation:
Intersecting lines are a pair of lines, line segments or rays are intersecting if they have a common point.
Perpendicular lines are a point where two city roads intersect.
Hope this helps. I am sorry if you get it wrong.
(90*.06)(this is the percentage converted to a decimal) this should equal the amount of tax that Ben will pay.
So the answer would be
90*6%
