The answer is 8 miles bc 48 divided by 6 equals 8
Answer: 30-4=x 4+x=30 x=26
Step-by-step explanation: So he has 30 tickets and he gives 2 to each of his friends which means that lee has 26 friends with 4 tickets left over.
Answer:
h. 36
Step-by-step explanation:
For a 68.26% confidence, z = 1.0.
Standard deviation (s) = 30 minutes
The sample size needed to assure that the sample mean does not differ from the true mean by more than 5 minutes is given by:
The sample size needed is 36.
Answer:
Between 371.6 seconds or 528.4 seconds.
Step-by-step explanation:
Thanks to the normal distribution table (attached) we know that:
95% would be a z between -1.96 and +1.96
z = (x- m) / sd
where x is the value we want to calculate, m is the mean (450) and sd is the set deviation (40). Now, replacing we have:
+ -1.96 = (x-450) / 40
+ -78.4 = x-450
x = 450 + - 78.4
x1 = 528.4
x2 = 371.6
In other words, the result is between 371.6 seconds or 528.4 seconds.