Figure 4.4 shows three wave crests moving to the right. When the crest of wave A passed point P, a watch reads 0.00 seconds. When the crest of wave B passed point P, a watch reads 10.00 seconds. What is the period of the wave?

period = 10.00 s, frequency = 0.1 Hz

Explanation:

The period of the wave T, is the time it takes the wave to move between two successive crests. Since wave A passes point P at 0.00 seconds and  wave B passes point P at 10.00 seconds, it completes a cycle of the wave and the period, T is 10.00s - 0.00 s = 10.00 s.

So, the period of the wave is T = 10.00 s

The frequency, f = 1/T = 1/10.00 s = 0.1 Hz

the answer is "a.) well–developed vascular system."

explanation:

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.