2*2^2+3 PEMDAS
2*4+3
8+3
11
Answer is 11
Answer: 
Step-by-step explanation:
Given : Sample size : 
The mean amount of money spent per owner = 
Standard deviation : 
Significance level : 
Critical value : 
We know that the confidence interval for population mean is given by :-
Hence, the 95% confidence interval for the mean amount spent per owner for an obedience class will be
<h2>a. Answer:</h2>
For this question we'll use the following method:
1. Let's subtract old value from new value
185$-160$ = -25$
The negative value implies that the price has decreased
2. Divide the result by the old value
25$/185$ = 0,1351
3. Convert this value to percentage:
0,1351 x 100 = 13,51%
Finally, by rounding to the nearest tenth:
13,5%
That means 13,5% decrease
<h2 /><h2>b. Answer:</h2>
1. Let's subtract old value from new value
77$-56$ = 21$
The positive value implies that the price has increased
2. Divide the result by the old value
21$/77$ = 0,2727
3. Convert this value to percentage:
0,2727 x 100 = 27,3%
Finally, by rounding to the nearest tenth:
27,3%
That means 27,3% increase
Answer:
A = 3, B = 10
Step-by-step explanation:
= 
= 
× 
× 
= 3i
in the form Ai
with A = 3 and B = 10
