What is (3x10) + (6x1) + (9x1/10) + (4x1/100) in standard form

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?

Agraphic designer created a logo on eight and a half by 11 inch paper. in order to be placed on a business card, the logo needs to be one and 7/10 inches by 2 and 1/5 in. what is the scale factor of the dilation

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?