What is the area of the sector shown

Find the power series expantion of f(z)=log(4=3z) at the point z=-1

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

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?