It’s going to be A
the other answers gave a difference more than 1
Answer:
confidence interval = (27.9, 28.3)
Step-by-step explanation:
Here we are given the population std deviation value as 5.7. So we can use Z critical value for finding out confidence interval.
Sample size n = 4386
Std error of sample mean =
Sample mean = 28.1
Z critical value two tailed for 98% = 2.326
margin of error = ±2.326*0.0861 =0.2003
confidence interval lower bound
=
Upper bound
=
After rounding off we get
confidence interval = (27.9, 28.3)
Answer: 30
Step-by-step explanation:
Because you can break the pentagonal base into triangles and the formula to find the area of a triangle is 1/2 Bh so 840/14 = 60 divided by 1/2 = 30
7/6
6 can go into 7 once
1 and 1/6
Answer: 1 1/6