Answer:
C.) i belive this is the correct one
Step-by-step explanation:
(10*16)/2
160/2=80
The area is 80.
x=3y
Switch sides
3y=X
Divide 3 both sides to get
T= x/3
Answer:
(25.732,30.868)
Step-by-step explanation:
Given that in a random sample of 42 people, the mean body mass index (BMI) was 28.3 and the standard deviation was 6.09.
Since only sample std deviation is known we can use only t distribution
Std error = 

t critical for 99% two tailed 
Margin of error
Confidence interval lower bound = 
Upper bound = 