Four people are painting a house. Zachary paints 15 1
5
of the house, Alyssa paints 33%
33
%
of the house, Chloe paints 0.3
0
.
3
of the house, and Nicholas paints 0.17
0
.
17
of the house.

Which choice lists the people in order from least to greatest by the amount of the house each painted?

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

(a) the volume of the cone is 20/3 in3

hence, option a is correct.