Teachers, am i right?

Well, the Sun does not have a observable velocity for (takes millions of years for it to move nanometers for us). You use the Earth's velocity squared multiplied by the orbital radius over the universal constant for gravity.

Or simply google the answer like I did. It's 4.409 x 10E30 lbs (1.9891 x 10E30 kg)

I didn't mean the sun's velocity man, the rubber ball's...

Not sure if you are trolling or being serious

What? "A rubber ball wheighed 5 kilograms bounces 3.8metres from a drop height of 4 metres..." Normally, if this were a real question on a test, it would go on with "Calculate the rubber ball's velocity" but in this case OP put "Determine the sun's mass" there to point out algebra is hard and those question often make no sense...