What is the place value of the 1 in 620.81

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?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.