If you take 4.56 you can see that it is automatically 1 dollar because 25% of 4 is 1. After that you're left with 56 cents, so whats 25% of that? Your answer is 14 cents. If you multiply 14 by it comes up to 56.
Answer: The force, F, acting on a charged object varies inversely to the square of its distance, r, from another charged object. When the two objects are 0.64 meter apart, the force acting on them is 8.2 Newtons
