Answer:
$160
Step-by-step explanation:
25% = 0.25
40/0.25 = 160
Answer:
The smallest xx-intercept is 
The largest xx-intercept is 
The yy-intercept is 
.
Step-by-step explanation:
Given a quadratic function in the following format:
The x-values of the x-intercepts are 
, given by the following formulas.
We have that:
This is not in the format above. I will multiply by (-1), so we have:
So, 
This means that
The smallest xx-intercept is
The largest xx-intercept is
The y-intercept is the value of f(x) when x = 0. So
The yy-intercept is .
Answer:
(0,-1)
Step-by-step explanation:
The y intercept is where it crosses the y axis
It crosses at -1
The y intercept is (0,-1)
Answer:
a. [ 0.454,0.51]
b. 599.472 ~ 600
Step-by-step explanation:
a)
Confidence Interval For Proportion
CI = p ± Z a/2 Sqrt(p*(1-p)/n)))
x = Mean
n = Sample Size
a = 1 - (Confidence Level/100)
Za/2 = Z-table value
CI = Confidence Interval
Mean(x)=410
Sample Size(n)=850
Sample proportion = x/n =0.482
Confidence Interval = [ 0.482 ±Z a/2 ( Sqrt ( 0.482*0.518) /850)]
= [ 0.482 - 1.645* Sqrt(0) , 0.482 + 1.65* Sqrt(0) ]
= [ 0.454,0.51]
b)
Compute Sample Size ( n ) = n=(Z/E)^2*p*(1-p)
Z a/2 at 0.05 is = 1.96
Samle Proportion = 0.482
ME = 0.04
n = ( 1.96 / 0.04 )^2 * 0.482*0.518
= 599.472 ~ 600
