Juan analyzes the amount of radioactive material remaining in a medical waste container over time. He writes the function f of x is equal to 10 times 0 point 9 8 to the x th power to represent the amount of radioactive material that will remain after x hours in the container. Rounded to the nearest tenth, how much radioactive material will remain after 10 hours?
Substitute x = 10 into the function: f(10) = 10 × 0.98¹⁰ ≈ 8.17. Rounded to the nearest tenth, about 8.2 units will remain, so the correct choice is 8.2 units.
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