book Maths Puzzle Numerical Ability

World grain demand. Freeport McMoRan projects that in 2010 world grain supply will be 1.8 trillion metric tons and the supply will be only 3/4 of world grain demand. What will world grain demand be in 2010?

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What is the shortest distance from the point (-1, 11/3) to the line 2y=3x+6? I am stumped on this question. Can someone please help me with it.

Find the equation, in standard form, including all integer coefficients, of the line perpendicular to 3x - 4y = 9 and passing through (-2, -1).