3 3/7 Times 2 wholes PLEASE HELP ME

Planning for the possibility that your home might get struck by lighting and catch on fire is part of a plan

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

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16