Pls help if u can 6th-grade math plss

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

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?