Iput this question under biology, but it is a food science question. i need to pass this test. the hot and cold wells of the service line should be cleaned and sanitized a. after every meal b. before closing each day c. at least once a week d. whenever an odor can be detected you in advance!

d.

explanation:

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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.