Answer:
2nd option, rectangle B
Step-by-step explanation:
After reflexion, the figure will be at the left side of x=-5
I think it's 15 or also could be 20, one of those two.
Answer
9³=729
15³= 27 ×125
18³=5832
Step-by-step explanation:
27×27= 9³=729
27×27=729
9³=729
either you multiply 27 by 27 or
you find 9³.
For 15³,
we divide 3375 by 27, to get the answer.
For 5382,
we find the third root of 5382, to get the answer.
Answer:
The smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.
Step-by-step explanation:
The complete question is:
The mean salary of people living in a certain city is $37,500 with a standard deviation of $2,103. A sample of n people will be selected at random from those living in the city. Find the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income. Round your answer up to the next largest whole number.
Solution:
The (1 - <em>α</em>)% confidence interval for population mean is:
The margin of error for this interval is:
The critical value of <em>z</em> for 90% confidence level is:
<em>z</em> = 1.645
Compute the required sample size as follows:
Thus, the smallest sample size n that will guarantee at least a 90% chance of the sample mean income being within $500 of the population mean income is 48.
=4*pi*radius^2
=4(pi)(4^2)
=4(pi)(16)
=64(pi) sq inches