I need help on this please

I think 16

Step-by-step explanation:

Rudy ran 12 miles in 1 1/2 hours. if you divied 12 by 3 to see how many miles she runs in 1/2 hour. it is 4 and 12+4=16 she will run 16miles in 2 hours.

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