Which situation describes a variable rate of change in distance relative to time? A. A car accelerates from a speed of 45 miles per hour to a speed of 55 miles per hour. B. A bicyclist travels at a speed of 12 miles per hour.
C. A man walks at a speed of 3 miles per hour.
D. An airplane is parked on the runway.

good job you smart son of a gun you are smarter that einstein. 7

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