A certain forest is 253 acres. To estimate the number of trees in the forest, a ranger randomly
selects 5 different 1-acre parcels in the forest and
determines the number of trees in each parcel. The
numbers of trees in the sample acres are 51,59, 45,
52, and 73. Based on the mean of the sanple, which
of the following ranges contains the best estimate for
the number of trees in the entire forest?
A) 11,000 to 12,000
B) 12,500 to 13,500
C) 13,500 to 14,500
D) 18,000 to 19,000

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

"exterior angles = 360 / number of sides.

60 = 360 / sides

sides = 360 / 60

sides = 6"