Answer:f(x)=3
Step-by-step explanation:
If a random sample of 20 persons weighed 3,460, the sample mean x-bar would be 3460/20 = 173 pounds.
The z-score for 173 pounds is given by:

Referring to a standard normal distribution table, and using z = 0.66, we find:

Therefore

The answer is: 0.2546
Step-by-step explanation:

Answer: 188.4 cm
Step-by-step explanation:
Given
the radius of the circle is 
Also, circumference is given by 
Putting values

The circumference of the circle is 