at a high school 9th and 10th graders were asked whether they would prefer robotics or art or an elective. to the nearest percentage of 10th graders surveyed prefered robotics?

An animal shelter has 21 puppies. if the puppies are 28% of the total dogs and cat population how many dogs and cats are in the animal shelter

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?

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.