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Apopulation of bolts has a mean thickness of 20 millimeters, with a population standard deviation of .01 millimeters. give, in millimeters, a minimum and a maximum thickness that includes 68% of the population of bolts.

What is the least amount of money a student will receive when participating in work study ? a. $10 an hour b. federal maximum wage c. federal minimum wage d. $6 an hour

What principle of light’s behavior can be used to make a far away object appear closer and also make a small object appear larger? a. reception b. absorption c. refraction d. transmission