Which equation represents exponential decay? 1.y=1/100 (31)^x
2.y = 1/10 (3.1)^x
3.y=10(0.13)^x
4.y=100(1.03)^x
in in a hurry. will give brianliest​

The correct option is the third one; y=10(0.13)^x

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