Krypton-85 has a half life of 11 years. if a scientist has 500 grams of krypton-85 in her lab and she decides not to use any for her experiments how much will remain after 50 years? (round to the nearest gram)

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

answer: i don't understand it

step-by-step explanation: sorry