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A sample of 9 grams of radioactive material is placed in a vault. Let $P(t)$ be the amount remaining after $t$ years, and let $P(t)$ satisfy the differential equation $P^{\prime}(t)=-0.032 P(t)$. Answer parts (a) through $(\mathrm{g})$. B. Solve $-0.119=-0.032 P(t)$ for $P(t)$. C. Evaluate $P^{\prime}(t)=-0.032(-0.119)$. D. Evaluate $P^{\prime}(t)=-0.032 P(-0.119)$.
There will be $\square$ of radioactive material left when it is disintegrating at a rate of 0.119 gram per year. (Type an integer or decimal rounded to one decimal place as needed.)