Why is it important that the product of two polynomials have only whole number exponents?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.