Kirsten and Gigi are riding in hot air balloons. They start 500 feet above the ground. Kirsten’s balloon rises 225 feet, falls 105 feet, and then rises 445 feet. Every time Kirsten’s balloon travels up or down, Gigi’s balloon travels 15 feet farther in the same direction. Then both balloons stop moving so a photographer on the ground can take a picture. A.) 1065
B.) -1065
C.) 1080
D.) -1080

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

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step-by-step explanation: