-3>x+16 hep me now i need help pl

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?