The perimeter of a rectangle is 6x ^ 2 - 6x - 4. The width of the rectangle is 2x + 1 1. What is the length of the rectangle?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

With number 11 ( show how you got the answer)