Margin of error is calculated using the following formula:
Margin error = Z-value*SD/Sqrt (N)
Where: Z -value at 95% confidence = 1.96; SD = Standard deviation = 10 minutes; N = Sample size; Margin error = 4 minutes
Substituting;
4 = 1.96*10/Sqrt (N)
Sqrt (N) = (1.96*10)/4 = 4.9
N = 4.9^2 = 24.01 ≈ 25
Therefore, 25 commuters will be selected at random to yield these results.
Answer: 15.4 m
Step-by-step explanation:
The area of a parallelgoram is:
A = bh,
where b is the base and h is the height.
We know that the base is 7.7 meters, and the height is 2 meters, so we can substitute:
A = 7.7 (2)
A = 15.4 m
Hope this helps! :)
Answer:
B) restaurant to the skating rink
C) (3,2)
Step-by-step explanation:
B) restaurant to the skating rink
C) (3,2)
The answer is 22 cupcakes.
I just subtracted 8 out of all the answer choices until I was left with 1 (the leftover cupcake). 22-8-8=6 and you can't subtract 8 out of 6 and get 1 so it can't be the number of cupcakes baked on that day
Answer:
8 square feet
Step-by-step explanation:
48/12=4
24/12=2
2x4=8