The barometric pressure at Sarah’s backyard weather station was 1,008 millibars at her first reading of the day. By mid-morning, the pressure had dropped 6 millibars. At noon it had risen 4 millibars from the previous reading. Sarah's afternoon reading showed another drop of 14 millibars. Then, on her final reading of the day, she logged another rise of 10 millibars. What was Sarah’s final reading?

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:

times by times