When Anna had her 10th birthday she was, 4’6” tall. On her 10th birthday she planted a tree that was 2’9” tall. On her 14th birthday she is 5’6” tall and the tree is 6’9” tall. Both Anna and the tree grew at a constant rate of change for those 4 years. How old was Anna when she and the tree were the same height?

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?