Calculate the answer. express it in scientific notation and include the correct number of significant figures.
(12 x 10^4) x (5 x 10^-2)
6 x 10^3
6.0 x 10^2
6 x 10^6

6x10^3

Explanation:

By multiplying (12 x 10^4) and (5 x 10^-2) we get

120000 x 0.05 = 6000

Since we are multiplying, the number of significant figures we need comes from the number with the least amount of sig figs in the problem (5 x 10^-2 has only 1 sig fig, 12 x 10^4 has 2). Therefore, our answer should only have 1 significant figure and we get 6 x 10^3.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?

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.