Answer:
<h2>69.5</h2>
Step-by-step explanation:
Given the confidence interval of the heights of american heights given as (65.3,73.7);
Lower confidence interval L = 65.3 and Upper confidence interval U = 73.7
Sample mean will be the average of both confidence interval . This is expressed mathematically as 
Hence, the sample mean is 69.5
200 * 0.15 = $30 off
200-30 = $170
Nancy must pay $170
Answer:
D
Step-by-step explanation:
Vertically organize the problems
( -4x^2-2x-1)
- ( 3x^3 +2)
Eliminate the minus sign by multiplying by -1
-1(3x^3 +2)
This is the new problem
( -4x^2-2x-1)
+ (-3x^3 -2)
Simplify any terms, then this is the answer
-3x^3-4x^2-2x-3
This is how I got it, but if there are any other answers, feel free to share
