1. Which line is perpendicular to the line 5y -2x=3 2. Which line is perpendicular to the graph of the line, y= 1/4x +7

I need this in by 10

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?

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Aplane intersects a pris paralel to the base of the prism. the cross section is a polygon wth eight sides. how many sides does the base of the prism have? a. 10 b. 8 c. 7 d. 9