Nancy was keeping track of how many miles she ran each month. In April, she ran 25 miles. In May, she ran 34 miles, and in June, she ran 42 miles. Choose the answer that is the best estimate for the total number of miles she ran during these 3 months.

She ran 101 miles within the 3 months. an estimate would be around 100

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