Digital ACT Science Practice Question #1815
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Divide Day 32 value (5.0 mg) by 2 = 2.5 mg.
Day 40 is 5 half-lives (40/8 = 5). Residual mass = 80 * (1/2)^5 = 80 / 32 = 2.5 mg (half of Day 32's 5.0 mg)....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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