For number 12 you need to make an expression using the information given. a) 25g + 18r + 15b could be the expression.
b) The variables would be 25g for the 25 gold seats, 18r for the 18 red seats and 15b for the 15 blue seats.
c) Plug in the number given according to the variables.
25(100) + 18(250) + 15(200)
2500 + 4500 + 3000
7000 + 3000
$10,000
Answer:
The point estimate is 0.45.
The 95% error margin is 0.042 = 4.2 percentage points.
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 given by:
Point estimate
We have that 
So the point estimate is:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
Error margin:
The 95% error margin is 0.042 = 4.2 percentage points.
It is (A) -91
Hope this helps. Have a good day!!
Step-by-step explanation:
x² + 8x + 15
(x²+5x)+(3x+15)
x(x+5) + 3(x+5)
(x+3) (x+5)
You can notify me if you don't understand
