practice%20exam%20for%20final1

# practice%20exam%20for%20final1 - [PRACTICE EXAM FOR FINAL...

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[ PRACTICE EXAM FOR FINAL ] Solution 1. Simplify: 2. Factor: 3. Simplify: 4. Subtract and simplify: 5. : Divide and simplify 6. , Let W be the amount of total work and suppose that 2 nd person takes . hours to do the job alone Then the amount of work done by the 1 st person alone in 1 hour is , and by 2 nd person alone in 1 hour is . Hence The amount of work done together in 4 hours is , and note that this is equal to total work . . . i e 7. : Write without negative exponents . 8 Simplify by rationalizing the : denominator 9. , , and . Hence 10. , then 11. Let be the time taken the car to . overtake the truck Then the distance traveled by the truck is . This should be equal to the , distance traveled by the car which is . . Hence the the distance is 12. Observe that the diagonal of the . square is the diameter of the circle Since the length of a side of the square is , the length of the

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[ PRACTICE EXAM FOR FINAL ] Solution diagonal is . Hence the radius of the circle is . , Thus the area of the circle is 13. Since
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practice%20exam%20for%20final1 - [PRACTICE EXAM FOR FINAL...

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