Answer: 2(x^2+1)^3 (-8x^4-16x^2+x-8)
Step-by-step explanation:
Answer: Test statistic = -8 and rejected region is (-∞,-1.966) and (1.966, ∞)
Step-by-step explanation:
Since we have given that
X is the length of a rod.
Sample Mean = 2 inches
Standard deviation = 0.5 inches
n = 400
Hypothesis are

Test statistics would be

Degrees of freedom = n-1 =400-1 =39
and 
Using the t-distribution table, we get that critical value z = 1.966
Since the two tail test will be applied to this,
So, the acceptance region will be (-1.966, 1.966)
Hence, the rejected region will be (-∞,-1.966) and (1.966, ∞)
Step-by-step explanation:
you would multiply 1.8 acres times 12 horses than take your answer is it more or less than how many acres this farmer has. btw that is not a lot of acres for a farm...