An oil rig is anchored to the sea floor 96 feet below sea level. A drill on the oil rig can
cut down through 24 feet of rock each hour.
Today, a newly drilled well is 96 feet below
che sea floor. What integer represents the
number of hours it took to drill that well?

X+ y = 5 ; x - y =3 solve using linear combination

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

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?