If f(x) = 2x+1 and g(x) = x^2+4x-3, evaluate and simplify g•f(x).

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30

The anwser cause i do not understand just plez

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.