SOMEONE PLEASE HELP AND HURRY IM BEING TIMED RN

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?

5x−4≥12 or 12x+5≤−4 can you with this problem

The price of one share of a company’s stock declined $13.89 every day for 2.5 days what was the stocks total decline in price