The length of an online commercial is about 15.1 seconds. Which of the following statements is true about the accuracy of the measurement?

The commercial must be between 15.0 and 15.2 seconds long.
The commercial must be between 15.0 and 15.1 seconds long.
The commercial must be between 15.05 and 15.15 seconds long.
The commercial must be between 15.1 and 15.2 seconds long,

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step-by-step explanation:

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

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step-by-step explanation: