Asample of carbon-12 has a mass of 6.00 g. how many atoms of carbon-12 are in the sample?

i have the answer but i don't understand how to solve it.

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.

Samantha is growing a garden in her back yard. she spend $90 setting up the garden bed and buying the proper garden supplies. in addition, each seed she plants cost $0.25. a. write the function f(x) that represents samantha's total cost on her garden. b. explain what x represents. c. explain what f(x) represents. d. if samantha plants 55 seeds, how much did she spend in total?

Factor the expression using the gcf. the expression 21m−49n factored using the gcf