20.) At the same time of day, a woman who is 78 inches tall casts a 63-inch 1 point shadow and her son casts a 21-inch shadow. What is the son's height? *

26 in.
27 in.
84 in.
104 in

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

$97520

step-by-step explanation:

add 6% to the value she got from selling the house.

7

step-by-step explanation:

the answer would be 7