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What is the conversion of the fraction 3/4 in base 12

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

If i have 20$ and i gave 5$ away how much i got

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x