The answer is D
Because there are two x’s
And 5 number 1’s
So 2x=5
1/4 of $440 is $110. This is the amount by which his balance changes each month. More specifically, his account balance decreases by $110 each month.
-240 divided by ( 8x2 ) is what? Note that we must perform the operation 8*2 first: 8*2 = 16. Now, divide -240 by 16, obtaining - 15. The correct answer is C.
Answer: (39.424, 61.576)
Step-by-step explanation:
When population standard deviation(
) unknown ,The confidence interval for population mean is given by :-

, where n= Sample size
= sample mean.
s= sample standard deviation
= Critical t-value (two-tailed)
Given : n= 15
Degree of freedom= 14 [df=n-1]


Significance level = 
For
and df = 14, the critical t-values : 
Then the 95% confidence interval for population mean will be :

Hence, a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall. : (39.424, 61.576)
Answer:

Step-by-step explanation:
1. Find the numerator:

2. Simplify the fraction:

The estimated value of the length of a square with an area of 200 square inches is about 14.14 inches