The water level of a tank every minute since it began filling is indicated by segments a, b, and c on the graph below.

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

How do i simply this radical expression?