The image shows EKGs of a person with normal heart waves and of a person having tachycardia. Based on this image, what kind of condition is tachycardia?
normal heartbeat
Anh
tachycardia
OA. The heart beats abnormally fast.
ОВ, The heart beats abnormally slow.
OC. The right atrium of the heart stops working.
OD
The left ventricle pumps less blood to the aorta.

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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.

a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves