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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.

At a little-known vacation spot, taxi fares are a bargain. a 49-mile taxi ride takes 63 minutes and costs $44.10. you want to find the cost of a 37-minute taxi ride. what unit price do you need?

The main cable of a suspension bridge is modeled by the equation y= 0.0048(x - 50)2 + 6. at what horizontal distances from the left support is the cable 10 ft above the roadway?