The compressions and rarefraction that make up a sound wave traveling through the air are 1. differences in air pressure.
2. differences in pitch.
3. echoes.
4. an example of infrasound.

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Solve for the equation x. 2x + 22 = 4(x + 3)

The equatorial radius of earth is approximately 6 × 10^3 km, while the equatorial radius of saturn is approximately 6 × 10^4 km. which of the following is true? a. the equatorial radius of saturn is approximately one hundred times that of earth. b. the equatorial radius of saturn is approximately ten times that of earth. c. the equatorial radius of earth is approximately one hundred times that of saturn. d. the equatorial radius of earth is approximately ten times that of saturn.