Does the equation below represent a relation, a function, both a relation and a function, or neither a relation nor a function? y=3x ^2-9x+20

The simple interest on a loan of $200 at 10 percent interest per year is $10 per year until the loan is paid off. $15 per year until the loan is paid off. $20 per year until the loan is paid off. $25 per year until the loan is paid off.

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?