The domain is the set of allowed input x values for the function. In this case, the domain is the inequality
x > -8 (note the vertical asymptote at x = -8 in which the function never touches)
If you want to write the domain in interval notation, then you would write
which is the interval from -8 to positive infinity (excluding both endpoints)
Answer:
Yes, evidence shows that the cream will improve the skin of more than 40% of women over the age of 50 in 0.01 significance level.
Step-by-step explanation:
We need to make a hypothesis test.
Let p be the proportion of women who used cream report skin improvement.
: p=0.4
: p<0.4
To test the hypothesis, we need to calculate z-score of the sample mean and compare its probability with the significance level.
z= where
- p(s) is the sample proportion of women reported improvement (0.5)
- p is the proportion assumed under null hypothesis. (0.4)
- N is the sample size (70)
Putting the numbers:
z= ≈ 1.71
And P(z<1.71) ≈ 0.955. Since 0.955>0.01 we fail to reject the null hypothesis that the cream will improve the skin of more than 40% of women.
Answer:
a. {(0, 7), (-1, 6)}
Step-by-step explanation:
subtract the equations
for , substitute x = 0
for , substitute x = 0
Answer:
x=-4 NOT (-4)
Step-by-step explanation:
-4 to the second power +16=0
-16+16=0