Need answer thanks! only answer if you know please!

a) (), b) (), c) , d) , e) (), f) (), g) ()

Step-by-step explanation:

All radioactive isotopes decay exponentially, the mass of the isotope as a function of time (), measured in grams, is defined by:

(1)

Where:

- Initial mass of the isotope, measured in grams.

- Decay rate, measured in or or .

- Time, measured in minutes, days or years.

We define the decay rate in terms of half-life by using the following expression:

(2)

Where is the half-life of the isotope, measured in minutes or years.

Now we proceed to determine the missing values:

a) Polonium-200 ()

b) Lead-194 ()

c) Iodine-125 ()

d) Kryption-75 ()

e) Strontium-79 ()

f) Uranium-229 ()

g) Plutonium-239 ()

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.

okay..i will pick 8!