Answer:
4 lb 7 oz = 71 oz
Step-by-step explanation:
Do you need to convert 4 lb 7 oz into oz?
If so, do the following.
Obviously, 7 oz is already in oz, so all you need to do is convert 4 lb into oz and then add 7 oz.
1 lb = 16 oz
For every lb, there are 16 oz. To convert lb to oz, multiply the number of lb by 16.
4 lb = 4 * 16 oz = 64 oz
4 lb 7 oz = 4 lb + 7 oz = 64 oz + 7 oz = 71 oz
Answer:
No
No
Yes
Yes
Step-by-step explanation:
Try it.
The answer is A. If you substitute -2 and -8/3 for x, the answer is 0.
Answer:
Step-by-step explanation:
The formula for determining the confidence interval for the difference of two population means is expressed as
Confidence interval = (x1 - x2) ± z√(s²/n1 + s2²/n2)
Where
x1 = mean sale amount for mail order sales = 82.70
x2 = mean sale amount for internet sales = 66.9
s1 = sample standard deviation for mail order sales = 16.25
s2 = sample standard deviation for internet sales = 20.25
n1 = number of mail order sales = 17
n2 = number of internet sales = 10
For a 99% confidence interval, we would determine the z score from the t distribution table because the number of samples are small
Degree of freedom =
(n1 - 1) + (n2 - 1) = (17 - 1) + (10 - 1) = 25
z = 2.787
Margin of error =
z√(s²/n1 + s2²/n2) = 2.787√(16.25²/17 + 20.25²/10) = 20.956190
