One freezer costs $623.95 and uses 90 kilowatt hours (kwh) of electricity each month. a second freezer costs $500 and uses 100 kwh of electricity each month. the expected life of each freezer is 12 years. what is the minimum electric rate in cents per kwh for which the 12-year total cost (purchase price + electricity costs) will be less for the first freezer?

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

i dont know sorry

step-by-step explanation: