Answer:
The answer is c
Step-by-step explanation:
The middle problem is adding, the others are taking away, so C is the correct answer
Answer: 
Step-by-step explanation:
Since we have given that
A very large study showed that aspirin reduced the rate of heart attacks by 44%.
we claim that they have a drug that will be more effective than aspirin.
so, our hypothesis would be

So, it will be one tail test.
Hence, 
They are on quarenent one
Answer:
90 diagonais.
Step-by-step explanation:

Answer:
uhm... what question? I don't see one