7. (05.03 LC) A polygon is shown:
4 units
M
N
2 units
3 units
1
R
units
The area of polygon MNOPQR - Area of a rectangle that is 12 square units + Area of a rectangle that is
square units (not only whole numbers, such as

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point