Use the Unit Circle to find the exact value of the inverse trig function

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Identify the number 127 as a rational or irrational. explain

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%