Answer:
triangllllllllllllllllllllllllllllllllllllleeeee
Step-by-step explanation:
Given:
The cost to install x number of central air conditioning units for a company is given by the function

To find:
The cost to install 45 air conditioners.
Solution:
We have,

Putting x=45, we get





Therefore, the cost to install 45 air conditioners is $60433.33.
It’s open circle and a line pointed left so less than of equal to 75?
Answer:
[ 0.4964, 0.5836 ]
Step-by-step explanation:
Data provided in the question:
Total sample size = 500
person voting for smith = 270
thus,
P( person voting for smith ), p =
= 0.54
Confidence level = 95%
now,
standard error, SE = 
or
SE = 
or
SE = 0.0223
now,
Confidence interval = p ± ( z × SE )
here,
z value for 95% confidence interval is 1.96
Confidence interval = [ 0.54 - ( 1.96 × 0.0223 ), 0.54 + ( 1.96 × 0.0223 ) ]
= [ 0.54 - 0.0436 , 0.54 + 0.0436 ]
= [ 0.4964, 0.5836 ]
Answer:
d
Step-by-step explanation: