exam Maths Puzzle Numerical Ability

For number Ten, i am supposed to draw a scatter plot showing the relationship between the percentage not covered by health insurance in 1990 and the percentage not covered in 1999.

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Math homework. :/

The Ozark Furniture Company can obtain at most 8100 board feet of oak lumber for making round and rectangular tables. The tables must be stored in a warehouse I am having a hard time with this one.

9x^2=14