PLEASE HELP ITS THE LAST DAY THAT J CAN TURN IT IN

Asequence of numbers begins with 12 and progresses geometrically. each number is the previous number divided by 2. which value can be used as the common ratio in an explicit formula that represents the sequence? 1/2 2 6 12

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

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).