The correct answer is letter C
9x^5-4x^2+7x-3 is the simplified version of your answer.
Answer:
4(3x-2)
Step-by-step explanation:
Have a great day :)
Answer: 0.6812
Step-by-step explanation:
Let p be the population proportion of trees are infested by a bark beetle.
As per given: p= 12%= 0.12
Sample size : n= 1000
Number of trees affected in sample = 1000
Sample proportion of trees are infested by a bark beetle. = 
Now, the z-test statistic : 
So, 

Hence, the value of the z-test statistic = 0.6812 .