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What value of x will make the triangles similar by the sss similarity theorem?

If the simple annual interest rate on a loan is 6, what is the interest rate in percentage per month?

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.