For his long distance phone service, Rafael pays a $6 monthly fee plus 8 cents per minute. Last month, Rafael's long distance bill was $19.28. For how many minutes was Rafael billed?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.

According to a study done by de anza students, the height for asian adult males is normally distributed with an average of 66 inches and a standard deviation of 2.5 inches. suppose one asian adult male is randomly chosen. let x = height of the individual. a) give the distribution of x. x ~ b) find the probability that the person is between 64 and 69 inches. write the probability statement. what is the probability?

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i