What is the ratio of the intensities of two sounds with intensity ...

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What is the ratio of the intensities of two sounds with intensity levels of 70 dB and 40 dB?
 
  A) 10:1
  B) 100:1
  C) 1000:1
  D) 10,000:1

Question 2

Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes.
 
  What magnitude force does the 5.0-kg box exert on the 3.0-kg box? A) 0 N
  B) 10 N
  C) 25 N
  D) 40 N
  E) 50 N

[stanleka1]

Answer to Question 1

C

Answer to Question 2

C

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Wow, this really help

[amcvicar]

Thanks for the timely response, appreciate it