Chang is 4 inches taller than nancy use n for nancy height. write an expressiob for chang's heightevacuate the expressions for n=60. what does your answer represent

Icould really use some with this question.

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?

God's gym charges a sign-up fee of $100 plus $30 per month. write an expression to represent how much someone would pay for a membership.