Answer:
I think its the green one
Step-by-step explanation:
if you get it wrong sorry
A) we know, all the angles in a triangle is equal to 180
So, 35 + 52 + 3(x + 2) = 180
87 + 3x + 6 = 180
3x = 180 - 93
x = 87/3
x = 29
b) Now, Angle C = 3(x + 2)
C = 3(29 + 2)
C = 3(31)
C = 93
Hope this helps!
Answer: 666.66
Step-by-step explanation: 30% times 666.66 = 200.00001 because it is a repeating decimal.
Answer: (72.535, 76.665)
Step-by-step explanation:
The confidence interval for population mean is given by :-

, where
= population standard deviation.
n= Sample size
= sample mean.
= Critical z-value (two-tailed)
Given : 
n= 81

The critical values for 90% confidence interval : 
Now, the confidence interval for population mean would be :

Hence, a 90 percent confidence interval estimatefor the average score of all students. : (72.535, 76.665)
Answer:
Moving the decimal 3 places to the right in a decimal number is the same as multiplying the number by 1000.