Label The side lengths of rectangle A on The grid below. Use straight edge to draw a grid of equal size squares within rectangle A. Find total area

15.4 mi is the missing length

810 divided 9= 90

To convert a foot measurement to a nanometer measurement, multiply the length by the conversion ratio. One foot is equal to 304,800,000 nanometers, so use this simple formula to convert:
1 ft = 304,800,000 nm
nanometers = feet × 304,800,000
The length in nanometers is equal to the feet multiplied by 304,800,000.
For example, here's how to convert 5 feet to nanometers using the formula above. 5' = (5 × 304,800,000) = 1,524,000,000 nm

feet X feet = square feet
That's it.

Impossible, as the numbers only add up to 45. Unless the question was meant to include the number 10 as well?

Oh wow, lots of math going on here...

There are 4840 square yards in an acre and 9 square feet in a square yard (4840 x 9 = 43,560).

An acre is an old timers measurement used in agriculture...
it was 4 poles wide and 40 poles long. A pole is equivalent to sixteen and a half feet. So back then, an acre was a piece of farming land 660 feet long (220 yards or one eighth of a mile) and 66 feet wide (22 yards or one eightieth of a mile).

Acre is a measure of area, which would be square feet.

Feet are a measure of distance.

The best you could do is something like this:
An acre is 43, 560 square feet.
Draw/imagine a square or a rectangle that would cover that much area.

If it is a square, it would be (approximately) 208.7 feet on each side.

Its perimeter (the distance around it if you walk an imaginary fence around you acre-sized plot) would be 834.8 feet.

Trying to to figure out an acre of 'Circle' - hmmmmm???

Radius = 1/2 of Diameter

sorry, just can't wrap my head around this to come up with the correct equation.
maybe we can get lucky with some other brainiac taking what I did provide and come up with a solution for you?

Square - It would be 208.7 feet across if you walk across it, and the same if you walk the other way across it.

Hi find answer by skeeter here
http://mathhelpforum.com/trigonometry/99703-trigonometry-help-totally-stuck.html