Answer: 
Step-by-step explanation:
Given : Sample size : n= 36 , which is a large sample (n>30) so the test applied here is z-test.
Significance level : 
Using Standard normal table , Critical value : 
Sample mean : 
Standard deviation: 
The confidence interval for population means is given by :-

i.e.

Hence, the 95 percent confidence interval for the fill rate = 
Answer: Choice B) The graph opens downThe negative 'a' value means the parabola opens downward. One way to remember it is that the positive 'a' value means "happy face" or "smile", and a negative 'a' value means "frowny face".
See the image attachment and note the color coding of the graphs.
Answer:
$12.50
Step-by-step explanation:
The shop offers a discount, buy 8 pounds for the price of 5.
Answer:
38
Step-by-step explanation:
7, 16, 8, 27, 9
7 + 9 = 16
16 - 8 = 8
8 + 19 = 27
27 - 18 = 9
9 + 29 = 38
Answer:
x ≤ -259/9
Step-by-step explanation:
Change into a number equation 9(x + 26) ≤ -25