Which of the following is a solution to the inequality below? d = 2
d = 6
d = 1
d = 3

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The wheels of a bicycle have a diameter of 70cm. how many meters will the bicycle travel if each wheel makes 50 revolutions

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