Why is “discretionary authority” an important thing to be aware of when dealing with stock brokers?

You could run the risk of investment fraud.  

Step-by-step explanation:

If you give a broker discretionary authority, you are giving them permission to buy and sell shares on your behalf without your knowledge.

If they are paid on commission, an unscrupulous broker may make a large number of  trades even when it is not in your best interest, because the more trades they make, the more they earn from your investment.

You could run the risk of investment fraud.  

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

costs the what? what is the cost of the pants?

step-by-step explanation:

if it is $10, then the price is 14.

take 40% of the cost, and then add the cost.

40% of 10 = 4

4+10 = 14.