Square QRST is similar to square KLMN. The ratio of the lenght of side KL is 3:2. If side ST = 15 cm, what is the lenght of side LM?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?