I think the correct answer from the choices listed above is option A. <span>The equation for density is mass divided by volume. An increase in density can result from all of the following except </span><span>a decrease in mass with an increase in volume.</span>
Answer:
18 000 m/ s
Explanation:
speed = wavelength * frequency
speed = 1.2 * 15 000 = 18 000 m/s