Iwill give a brainlist if you get it right

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

Glenda makes an online purchase for picture frames for $12.95 each and formats of $5.89 each the site says it taxes paid by the customer or 6.5% of the total purchase price shipping charges are based on the

Triangles abd and ace are similar right triangles. witch ratio best explains why the slope of ab is the same as the slope of ac?