Answer: 3600
Step-by-step explanation:
Area of a square = side^2
Area = √2500 = 50
If side is increased by 10, length if side becomes 60 inches
Area = 60^2
Area = 3600 sq. in.
Answer: second option
Step-by-step explanation:
You know that it is a right triangular window frame.
Then, you can use the Pythagoren Theorem to find the lenght of the third side:

Where "a" is the hypotenuse (or the longest side), and "b" and "c" are the legs .
Then, you can solve for one of the legs:

Since you know the lenght of the hypotenuse and the lenght of one leg, you can substitute values.
Therefore, you get:


That is the number of hours he will spend answering phone calls.
The limit can be found by simplifying the expression.
The limit is -12.