The length of a phone conversation is normally distributed with a mean of 4 minutes and a standard deviation of 0.6 minutes. what is the probability that a conversation lasts longer than 5 minutes

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

2x minus y equals 6, x plus y equals negative 3

Ihonestly have no clue if it's each or none.