calculus
posted by soffy .
factory worker wages, according to data released by city chamber of commerce, the weekly wages of factory workers are normally distributed according to the probability density function
f(x)= (1/50√2π)e^((1/2)((x500)/50)^2)
find the probability that a worker selected at random from the city has a weekly wage of 450550

From f(x) you see that 500 is the mean and 50 the standard deviation.
You can write the interval 450550 as:
500 +/ 50 = mean +/ standard deviation
So, what's the probability a normally distributed variable to be within one standard deviation of the mean?