Unit 2 AP Precalculus Practice Test 2026

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A radioactive substance has an initial mass of 250 grams, and its mass halves every 5 years. Which equation shows the number of grams, M(t), remaining after t years?

P(t) = 3,000 (3) t/40 M(t) = 250 (½) t/5 6.6 x = −2, 2

Correct Answer:

M(t) = 250 (½) t/5

Explanation:

Correct answer: M(t) = 250 (½) t/5

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