A company manufactures steel tubes with an average circumference of 12.5cm. The maximum divergence allowed is 0.15cm. The circumference of the tubes follows a normal distribution with standard deviation 0.09cm. What percentage of tubes have an unacceptably large circumference? A. 5.25%
B. 4.50%
C. 4.78%
D. 4.00%

sine

step-by-step explanation:

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

part a: 1.08

part b: 27.59