Multiply 8 with pi since the equation for circumference is 2pi(r), or d(pi). The answer is 25.13
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, 