Carlos is buying water. He needs 4 liters. A half-liter of water costs $2.89. A 250-milliliter container of water costs $1.39. What should Carlos buy so he gets 4 liters at the lowest price? Explain.

For each proportion find the unknown number x 1/5/8=×/15

Suppose your school costs for this term were $4900 and financial aid covered 3/4 of that amount. how much did financial aid cover? and how much do you still have to pay?

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?