Calculate the average rate of change of f(x) = 1 x - x2 - 2 for 3 ≤ x ≤ 6.

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

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

Tom can paint the fence in 12 hours, but if he works together with a friend they can finish the job in 8 hours. how long would it take for his friend to paint this fence alone?