Determine whether the value is from a discrete or continuous data set. length of rock song is 3.5 minuteslength of rock song is 3.5 minutes is the value from a discrete or continuous data set?

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?

Which one is true about the hexagons ?

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry