Answer:18.6
Step-by-step explanation: 40 divided by 100=0.4, 0.4 x 31= 12.4, 31-12.4=18.6
Never. If you set up an equation making them equal to each other and you solve it, it will give you that they are equal. Even when you divide them separately (3 by 6 and 2 by 4 ) you get 1/2 for both. You can't change that. Look in the picture
To write 2.3 as a percent it would just be 230%
Answer:
Step-by-step explanation:
Answer:
Step-by-step explanation:
Expression for the rectangular area and perimeter are, respectively:
After some algebraic manipulation, area expression can be reduce to an one-variable form:
The first derivative of the previous equation is:
Let the expression be equalized to zero:
The second derivative is:
According to the Second Derivative Test, the critical value found in previous steps is a maximum. Then:
The maximum area is: