Which event signals the brain to breathe? increased blood levels of oxygenincreased blood levels of carbon dioxidecontraction of the diaphragmrelaxing of the diaphragm
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Ответ:
Explanation:
increase blood level of carbon dioxide signals the brain to breathe
Ответ:
Take the segment between the first two vertices to be the base of the triangle.
The length of the base is then 8 - 1 = 7.
The height of the triangle is then 6-2 = 4.
The area of the triangle is thus 7*4/2 = 14.
Hope that helps!