Ch. 11 test - ln 3 5-d i Part II. Give complete solutions...

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Name ____________________________ Test 3 DM 0084 Ch. 11 Part I. Problems 1 - 20 are worth 3 points each. Put your answer in the box. Only the answer in the box will be graded. Answers should contain positive exponents only . Be careful. 1. Evaluate 2 4 2. Rewrite 4 9 - with a positive exponent. Do not evaluate with a calculator. 3. Evaluate e - 2 3 4. Evaluate - F H G I K J 1 3 3 5. Simplify: (a 8 )(a 3 ) 6. Simplify: (y 2 )(y 9 )(y -5 ) 7. Simplify: x x 4 7
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8. Simplify: (y 3 ) 4 9. Simplify: y y 3 8 2 - - F H G I K J 10. Perform the multiplication: 3y 2 (2y - 3) 11. Simplify (10 6 ) (10 -10 ) 12. Evaluate: 6.42 ÷ 10 3 13. Change to scientific notation: .0000000475 14. Change to an “ordinary” number: 3.45 x 10 7
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15. Multiply: (7.2 x 10 12 )(3.9 x 10 -2 ). Give answer in scientific notation . 16. Solve for x: 2 x = 32 17. Solve for y: 3 y - 2 = 27 18. Evaluate to the thousandths place: log 25 19. Evaluate to the thousandths place: 3 e 1 2 . 20. Evaluate to the thousandths place:
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Unformatted text preview: ln 3 5-d i Part II. Give complete solutions to problems 21 - 26. Show all your work if you want to receive any partial credit. 21. (8 pts) Suppose there are 6.023 x 10 23 molecules in one gram of water. How many molecules are in a beaker containing 10.5 grams of water? Leave answer in scientific notation. 22. (8 pts.) Jim-Bob invested $3500 at 6.5% compounded quarterly (4 times per year). How much was the accumulated amount after 7 years? You may use the formula A = P(1 + r/n) nt 23. (8 pts.) The number of grams of a chemical that will dissolve in a solution is given by the formula C = 100e 0.02t where t is the temperature in degrees Celsius. Evaluate when t = 20. 24. (8 pts.) Simplify: 6 10 12 4 4 3 2 x x x x-+-25. (8 pts.) Solve for x: 3 1 243 2 x-= 26. (8 pt. bonus) Solve the equation: 9 2x = 729...
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Ch. 11 test - ln 3 5-d i Part II. Give complete solutions...

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