Answer:
(2a + 1)(a + 3) = 2a² + 7a + 3
Answer: C
Step-by-step explanation:
Rejecting the null hypothesis means we've found a significant difference in the means. That means the probability that we'd see means so far apart by chance is less than our threshold of significance.
(4*10)+(7*1/100)=40+7/100=40 7/100
I think your answer is a
