Hich of the following sets of numbers could be the lengths of the sides of a triangle?
a. 3 ft, 6 ft, 9 ft
b. 3 ft, 5 ft, 7 ft
c. 3 ft, 6 ft, 12 ft
d. 3 ft, 9 ft, 27 ft

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs