If the consumption function is c= $400 billion + 0.8y

a) what is the mpc?
b) how large is autonomous c? 400 billion
c) how much do consumers spend with incomes of $4 trillion?
d) how much do they save?

idk the answer but just put a

step-by-step explanation:

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