EC14C_Problem_Set_2_-_updatedb

EC14C_Problem_Set_2_-_updatedb - EC14C Problem Paper #2...

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1 EC14C Problem Paper #2 Inequalities and Complex Numbers Inequalities In Exercises 1-5 find the solution sets to the linear inequalities and depict these on a number line. 1. 4 5 3 2 x x 2. 3 1 6 5 4 3 3 x x 3. 14 7 6 x 4. 7 4 3 1 x 5. 6 2 3 5 3 x In Exercises 6-11 find the solution sets to the quadratic inequalities and depict these on a number line. 6. 0 3 2 2 x x 7. 12 2 x x 8. 2 ) 1 ( x x 9. ) 1 ( 4 3 2 x x 10. 0 1 2 x 11. 0 10 3 2 x x 12. Mona invests $100 at 8% yearly interest. How much does she have to invest at 9% so that the total yearly interest from the two investments exceeds $26? 13. The cost of manufacturing x microcomputers of a certain kind each week is given by x C 50 2000 , and the revenue from selling these is given by x R 75 .How many microcomputers must be produced and sold in order to realize a profit? 14. A hardware kiosk in a shopping mall sells a dozen washers for $2.95. Beyond the
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EC14C_Problem_Set_2_-_updatedb - EC14C Problem Paper #2...

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