Help quick question worth a good amont of points i jist dont know what it means or how to do it

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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?

What is the measure of angle x? a.101 b.158 c.44 d.79