Advanced MathEasyWater left after a quadratic drain
Advanced Math practice question
The amount of water, in litres, left in a bucket t minutes after a plug is pulled is modelled by w(t) = 12 − t². How many litres are left after 2 minutes?
Answer: 8
12 − 2² = 12 − 4 = 8.
Common wrong answers
- If you answered 4
- 4 is t², the amount drained.
- If you answered 10
- 10 subtracts t instead of t².
- If you answered 16
- 16 adds instead of subtracting.
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