What is the function rule of the table shown below ? What is the domain and range ?

Pls help I’m desperate

This is worth 23 points yall pls

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33