Using the formula for velocity shown below, what is the average velocity of a car that traveled 100 miles south of where it began for a duration of 2 hours?

50 mph south

50 mph north

200 mph south

200 mph north

200 mph north

Explanation:

So to answer your question, when traveling at a constant velocity of 100 mph, it will take 36 seconds to travel one mile.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.