Answer:


Step-by-step explanation:
Let x and y are the two positive real numbers
product of two numbers is 21


The sum of the two numbers is f(x) =x+y
Replace y with 21/x

we need to find smallest possible sum , so we take derivative using power rule

when sum is minimum then the derivative is equal to 0


multiply both sides by x^2


Take square root on both sides




The correct answer is b because of the answers given you start to graph it gives you the answer.
139x12.54+8.27×8.27×6%=1747.163574
Answer:
12
Step-by-step explanation: