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You have one mole rocks in a gravel pit. How many rocks are in this gravel pit?

Evaluate this exponential expression,8. (2 + 3)2 – 42

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Compare and contrast refraction of light and sound will give brainliest