Asports car has been traveling at 50 miles per hour(mph) if the car continues at that same speed how far will it travel in the next 10 minutes?

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Does the point (1, sqrt 7) lie on circle shown.

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.