A slice is made perpendicular to the base of a right rectangular pyramid through the vertex.

What is the area of the resulting two-dimensional cross section?

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The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?