Step-by-step explanation:
- Initial velocity (u) = 7 m/s
- Final velocity (v) = 9 m/s
- Time taken (t) = 2s
- <em>a</em> denotes acceleration
- <em>v</em> denotes final velocity
- <em>u</em> denotes initial velocity
- <em>t</em> denotes time
(Answer)
Answer:
90% confidence interval for the mean commute time of working adult Calgary residents is between a lower limit of 26.72 minutes and an upper limit of 30.28 minutes.
Step-by-step explanation:
Confidence Interval = Mean + or - Error margin (E)
mean = 28.5 minutes
sd = 24.2 minutes
n = 500
degree of freedom = n - 1 = 500 - 1 = 499
confidence level = 90%
t-value corresponding to 499 degrees of freedom and 90% confidence level = 1.64801
E = t × sd/√n = 1.64801 × 24.2/√500 = 1.78
Lower limit = mean - E = 28.5 - 1.78 = 26.72 minutes
Upper limit = mean + E = 28.5 + 1.78 = 30.28 minutes
90% confidence interval is between 26.72 and 30.28 minutes.
opposites are also called additive inverse and have the sum of zero.
Answer:
The answer is1202.5 . I guess
Rate = distance / time
Rate = 21 miles / 3 hours
Rate = 7 miles / hour
The answer is choice A. Hope this helps.
