Robert uses two sides of a right triangle to find the cosine of one of the acute angles and gets that the cosine of that angle is 2.1. Did Robert make a mistake? Explain or support your answer.

Which system of linear inequalites is represented by the graph?

Write an algebraic expression for the word expression the quotient of c and 8

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean