Answer:
Quadratic polynomial is x^2 - x - 20
Answer:
The required confidence inteval = 94.9%.
Step-by-step explanation:
Confidence interval: Mean ± Margin of error
Given: A confidence interval for the true mean diameter of all oak trees in the neighbourhood is calculated to be (36.191, 42.969).
i.e. Mean + Margin of error = 42.969 (i)
Mean - Margin of error = 36.191 (ii)
Adding (i) and (ii), we get

Margin of error = 42.969-39.58 [from (i)]
= 3.389
Margin of error = 
here n= 25 
i.e.

Using excel function 1-TDIST.2T(2.054,24)
The required confidence inteval = 94.9%.
A and d seem correct to me.
b and c are definitely wrong.
3.305
+1.7
5.005
Line up the decimal points and add like you usually would add.
5.005 is the answer.
Answer:
x^4 + x^3 + 13x + 5
Step-by-step explanation: