A ∠A and ∠ B ∠B are vertical angles. If m ∠ A = ( x + 23 ) ∘ ∠A=(x+23) ∘ and m ∠ B = ( 5 x − 9 ) ∘ ∠B=(5x−9) ∘ , then find the measure of ∠ B ∠B

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

For the inequality |c| < |d| to be true, which of the following must be true?

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.