What are the steps to calculate this type of problem?

27,000 cubic centimeters

Explanation:

We would first convert the sides of the the cube into centimeters as so:

.3M * (100cm / 1M) = 30cm

Then we would find the volume with the formula:

L * W * H = V

V = 30cm * 30cm *30cm

V = 27,000 cubic centimeters exactly

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.