Write the equation in standard form for the circle passing through (0,8) centered at the origin

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?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer