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Usage:In French, if you want to talk about an action which occured and which has completed; for example 'Jake ate the apple', you would use the passé composé. This is a specific event which has taken plac...

Infant mortality rate is the number of babies who die before the age of one per thousand live births per year. Infant mortality rate shows how countries survival rates vary due different stages of develop...

From the equation for speed: Speed = frequency * wavelength 
=> v = 1000 * 0.34 = 340 metres per second 

There are many reasons for using statistical models. Some examples include:
1) To simplify a real world problem
To improve understanding and describe a real world problem, for example understan...

From the equation of the area of a triangle,
Area = 1/2 ACCBsin(C)
20 = 1/2 * 8 *12 * sin(x) 
=> sin(x) = 0.416666...
=> x = 0.430 to 3sf