The answer to your question is:
1/3x + 1/2x = x - 9
Answer:
(a+b)1/3+a^2
Step-by-step explanation:
Hope it helps!
The formula for half-life is:

A is the amount remaining, P is the initial amount, t is the time that has passed, and h is the half-life of the substance. Plug in the values that you know and solve:

Rounded to the nearest whole number, the density of the substance was about 13<span>mg / cm².</span>