Answer: (7.27%, 7.55%)
Step-by-step explanation:
As per given , we have
Sample size : n= 392
Sample mean : 

Critical two-tailed z-value for 95% confidence = 
Required confidence interval would be :

Hence, the required 95% confidence interval for the mean percentage share of billing volume from network television for the population of all U.S. advertising agencies : (7.27%, 7.55%)
m = 1.49
b = 5.50
equation y = 1.49x + 5.50
Non-proportional
Positive Slope
Answer:
C. 2
Step-by-step explanation:
Use the formula
x = −
b
/2
a
to find the maximum and minimum.
(
−
3
,
2
)
We have a formula for that( according to the Intersecting chords theorem)

3×4=2×jk
6=jk