Practice Quiz

IB Mathematics SL Prep - Question List

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11. In theory, the weight of an observation is defined to be ______ to the variance (standard error squared) of the observation.
  1. Proportional
  2. Inversely proportional
  3. Equal
  4. None of the above.
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12. What is the cotangent of 31.5° to three significant figures?
  1. 0.315
  2. 0.613
  3. 1.632
  4. None of the above
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13. How long will it take for Ron’s $37,353 investment to double if he expects 9% returns?
  1. 5 years
  2. 8 years
  3. 9 years
  4. 9.5 years
  5. 10 years
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14. To find the percentage (p) of any number (n), which formula can be used?
  1. (p x 100) ÷ n
  2. (p x n) ÷ 100
  3. 100 - (p x n)
  4. (n x 100) ÷ p
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15. Given a right triangle (ABC) with side a = 30.30 ft and hypotenuse c = 36.41 ft, what is the length of the side b?
  1. 20.19 ft
  2. 47.37 ft
  3. 67.56 ft
  4. None of the above
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