Asquare with a side length of 8 units is reduced to a square with a side length of 4 units. what is the scale factor of the reduction? 2 4

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?

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radil and altitudes is 4: 3? 23

Which expression converts 45 degree to radians