The nine different classes of vertebrates include

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi,r^3 , where r is the sphere’s radius.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?