Answer:
70:) i think that’s the right answer.
Step-by-step explanation:
Answer:
Find out the which expression shows the length of each piece .
To prove
As given
A 12 foot board is split into 5 equal pieces.
Than
Here
Total length of board = 12 foot
Total number of pieces = 5
Therefore the length of each pieces is 2.4 foot.
The answer is B. I hope this helps
Answer: a. 69.72 ± 1.37
Step-by-step explanation:
We want to determine a 90% confidence interval for the mean height (in inches) of adult men in the United States.
Number of sample, n = 25
Mean, u = 69.72 inches
Standard deviation, s = 4.15
For a confidence level of 90%, the corresponding z value is 1.645. This is determined from the normal distribution table.
We will apply the formula
Confidence interval
= mean ± z × standard deviation/√n
It becomes
69.72 ± 1.645 × 4.15/√25
= 69.72 ± 1.645 × 0.83
= 69.72 ± 1.37
The lower end of the confidence interval is 69.72 - 1.37 = 68.35
The upper end of the confidence interval is 69.72 + 1.37 = 71.09
Answer: 11/12
Step-by-step explanation: hope this helps!
