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The price of crude oil during the period 1999-2001 was modeled by: P(t) = -10t^2 + 32 dollars per barrel, where t = 0 corresponds to 2000. What was the marginal price of crude oil in 2001?
A set of children's blocks contains 3 shapes, longs, flats and cubes. There are 3 times as many longs as cubes and 30 fewer flats than longs. If there are 600 blocks in all, how many longs are there?
If a*b means 2a+b, then what is 2*5?
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