TEACHER-GUIDE-VERIFIED · TG-V9-065

6. A crew dose limit is 500 units. Background is 260 and a storm adds 18 units per hour. Solve 260+18h <= 500.

Verified solution

Solution: 18h<=240, so h<=13.33. For whole hours without exceeding the limit, h<=13.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

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VIDEO HELP · TG-V9-065

Solve an Accumulation-Limit Inequality (TG-V9-065)

Solve 260 + 18h ≤ 500: subtract 260 and divide by positive 18 to obtain the exact bound of 40/3 hours. The maximum whole-hour count is 13; totals of 494 at 13 hours and 512 at 14 confirm it. Classroom model with unspecified units, not a real exposure limit.

Space Math Explorers · approved worked example · 1:55 · Watch on YouTube

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These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.