Write an equation for each problem. Then solve. Round to the nearest tenth if necessary. Find 39% of 65.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

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

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost