Answer:
Step-by-step explanation:
Given that a part of a study of the treatment of anemia in cattle, researchers measured the concentration of selenium in the blood of 36 cows who had been given a dietary supplement of selenium (2 mg/day) for one year.
If x is the selenium concentration then
X has mean= 6.21 mg/dl
and std dev = 1.84
Sample size n = 36
std error of sample = 
Margin of error for 95%

Confidence interval = 
Answer:
C
Step-by-step explanation:
you get 2 hours before hourly rate kicks in
Look at C for 2 hours add'l past the initial 2 hours you are charged 14.50
so 2 x + 3.50 = 14.50
will show x = 5.50 / hr
That would be 1,132
Please mark me brainliest.
DIFFERENTIATION
6+f(28+b(4)=6+112f+4bf
b=6+112f/-4f
b=1*6^0+1*112f^0/1*-4f^0
b=1+1/1
b=2