A company uses paper cups shaped like cones for its water cooler. Each cup has a height of , and the base has a diameter of . The cooler has of water in it. How many cups can be filled from the cooler? Use for , and do not round your answer.

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

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Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.