Determine the check digit (d) for the UPC number 4-53648-94211-d.
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In trapezoid klmn, kj=19.2 and jm=22.5. identify ln.

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%