How to find lateral surface area of a cylinder with with demotions of h=12 and r=2

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 20 = x a. 5, 4 b. -5, -4 c. -5, 4 d. 5, -4

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

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