I need help can someone help asap?!

Is a positive integer raised to a negative power always positive

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?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have