The amount of a radioactive isotope decays in half every year. the amount of the isotope can be modeled by f(x) = 346(one half)x and f(1) = 173. what does the 346 represent?

346 is initial amount of radioactive isotopes.

Step-by-step explanation:

The amount of a radioactive isotope decays in half every year.

The amount of the isotope can be modeled by

f(1)=173

We are given half life of isotope is 1 year.

f(x) represents the amount of isotope left after x years.

f(1) represents half amount of radioactive isotope.

If we x=0 into model

x=0 means initial value of time.

Therefore, 346 represents the initial amount of the radioactive isotopes.

Hence, 346 is initial amount of isotopes.

y -5 = (-1/4)(x + 8)

step-by-step explanation:

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15