Find the required ratio.The percent error in a measurement is the ratio of the error in the measurement to the measurement itself, expressed as a percentage. If the length of a building is measured as  while the correct length is  what is the percent error, correct to 4 decimals?

A. 0.0100%
B. 0.0047%
C. 0.4682%
D. 0.4704%

Answer: D

Mathematics

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Find the exact value of the expression.cos  cos  - sin  sin 

A. 0
B. 1
C. -1
D.

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Simplify the expression by combining like terms.-2(-2y + 8) - (7y + 7) - 6y + 15

A. 9y + 15 B. -9y + 24 C. 5y + 6 D. -9y - 8

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Solve.If y varies inversely as the square of x, and y = 9 when x = 2, find y when x = 18.

A. 1
B.
C. 729
D. 81

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Complete the table.  Object  Millimeters   (mm)  Centimeters  (cm)  Meters  (m) Width of book?  40?

A.

  Object  Millimeters 
  (mm)		  Centimeters
  (cm)		  Meters
  (m)
 Width of book  4.0   40  400

B.
  Object  Millimeters 
  (mm)		  Centimeters
  (cm)		  Meters
  (m)
 Width of book  4.0   40  4000 

C.
  Object  Millimeters 
  (mm)		  Centimeters
  (cm)		  Meters
  (m)
 Width of book  400   40  0.4 

D.
  Object  Millimeters 
  (mm)		  Centimeters
  (cm)		  Meters
  (m)
 Width of book  4000   40  0.4 

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Mathematics