Tom a gathered data by observing the cross section of the tree trunk that is shown below. tom noted all the information below. which statement gives quantitative data? some of the growth rings are wider than others. the tree was 20 years old when it was cut down. a forest fire burned the tree during the years that it was alive. the widest growth rings indicate years that had the most rainfall.

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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.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

the answer u all are looking for is 4000000000000000000000 million years.