Find the cos a and tan b to four decimal places. urgent

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Either enter an exact answer in terms of \piπ or use 3.143.14 for \piπ and enter your answer as a decimal.