Write the contrapositive of the conditional statement. if a shape is a rhombus, then it has four congruent sides.

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

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

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal