1. iris has two ribbons. the first ribbon is 11.7 in. long. the second ribbon is 5.25 in. long. she wants to cut them so that they are the same length.

what is the answer
(a) estimate the difference between the ribbon lengths.
(b) will your estimate be high or low? explain.
(c) how much does iris need to cut from the longer ribbon to make the ribbons the same length?

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

ok then what happened.