2. Steel rods are manufactured with a mean length of 25 centimeters (cm). Because of variability in the manufacturing process, the lengths of the rods are approximately normally distributed, with a...

Extracted text: 2. Steel rods are manufactured with a mean length of 25 centimeters (cm). Because of variability in the manufacturing process, the lengths of the rods are approximately normally distributed, with a standard deviation-of 0.07 cm. a) What proportion of the rods shorter than 24.9cm? b) Any rods that are shorter than 24.85 or longer than 25.15 cm are discarded. What proportion of rods will be discarded?