Monsters, inc. has been accident free for 47 days out of 365. what percentage of days have not been accident free?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

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?

How are algebraic expressions evaluated using substitution?