Aradioactive substance has an initial mass of 100 grams and its mass halves every 4 years. which expression shows the number of grams remaining after t years?

1) 100(4)^t/4
2) 100(4)^-2t
3)100(1/2)^t/4
4)100(1/2)^4t

We start with a mass of

After 4 years, we have

After 8 years, we have

So, as you can see, the general formula is

maya’s expression will generate the wrong sum because she violated the commutative property.

step-by-step explanation:

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation: