A scientist measures a substance to be 0.6 grams. Calculate the percent of error in the measurement. Show all your work for full credit.

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?

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?

If y varies directly as x2 and y=6 when x=6, find the constant of variation.