I tried everything from dividing, adding, subtracting, multiplying, you name it but I can not seem to get the correct answer. How do I solve this problem?

320

Step-by-step explanation:

LENGTH=40

WIDTH/BREADTH=80

AREA=LXB

=80X40=320

HOPE THIS HELPS YOU.

9514 1404 393

  244 tiles

Step-by-step explanation:

These "border" problems can be a little tricky.

The tiles are 1 ft square, so an integer number of them fit along each of the sides. The 40-ft side will take 40 tiles for its border, and the 80-ft side will take 80 tiles.

The total number of tiles along each of the four sides is ...

  40 + 80 + 40 + 80 = 240 . . . tiles

However, there is also a tile in each of the corners. There are 4 of those, so the total number of tiles surrounding the pool is ...

  240 +4 = 244 tiles

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Alternate solution

For a border of width w, the outside area of the pool plus the border is ...

  A = LW = (80 +2w)(40 +2w) = 80·40 +240w +4w²

The area of the pool is ...

  A = LW = (80)(40) = 80·40

Subtracting the area of the pool from the total area including the border gives ...

  border area = (80·40 +240w +4w²) -(80·40) = 240w +4w²

We know the width of the border is 1 foot, so w=1 and the border area is ...

  border area = 240·1 +4·1² = 244 . . . . square feet

Each tile is 1 square foot, so 244 tiles are needed for the border.

It can help to draw yourself a diagram. It can also help to make a small model using blocks, Scrabble tiles, Legos, jigsaw puzzle pieces, squares cut from paper, or even coins (pennies). Anything that will give you an idea of how to count the tiles required to make a border can be helpful.

Luis skates farther.

Step-by-step explanation:

The reason it is Luis is as follows. If Luis skates 2/3 of a mile, it would be more than Isabella who only skated 2/4 of a mile. This can be visually represented as shown below:

Luis is the first image while Isabella is the second image.