Area

I suppose you mean square decimeters. Since a meter has 10 decimeters, a square meter has 100 square decimeters.

2918520 sq ft

Depends on what kind of shape it is.

Circle pi*R²

Triangle Square/2

470 square metres = 5,059 square feet

Approx 16034 sq miles

10

All you have to do is multiply 394 x 528

394 x 528 = 208032

208032 square feet

No. Sq km is a unit of area, not volume.

1 inch = 2.54 centimeters
(1 inch)2 = (2.54 centimeters)2

There is a big red herring in his aquarium. It is the "height of 15 inches",
which is totally irrelevant for his purpose. All he cares about is the
300 square inches of real estate that the tank occupies.

(300 inches2) x (2.54 cm)2/inch2 = 1,935.48 cm2 .

That much cloth, if it's appropriately shaped, precisely exactly fits under the tank,
with neither a warp nor a woof to spare. He might want to add another centimeter
of fabric all around. With only the area of the base, I can't tell him the required final
dimensions.

642.4 square inches.

This question cannot be answered sensibly. A square foot is a measure of area, with dimensions [L2]. A metre is a measure of distance, with dimensions [L]. The two measure different things and basic dimensional analysis teaches that you cannot convert between measures with different dimensions such as these without additional information.

I assume it is called 10 square miles!

330 cm = 3.30 meters

215 cm =2.15 meters

By one definition, it includes about 7, 848,000 square miles of ocean surrounding Antarctica.

(20,732,000 sq. km)

According to Wikipedia, its length is 255 miles but the larger dimension is its width, which is 630 miles.

A square yard is a unit of area. A foot is a unit of length. The two units are therefore incompatible.

None, since there can be no conversion. A metre is a measure of length in 1-dimensional space while a square foot is a measure of area in 2-dimensional space. The two measure different characteristics and, according to the most basic principles of dimensional analysis, any attempt at comparisons or conversions between the two are fundamentally flawed.

140420.54. 140420.54.

It is 104,094 square miles.

104,093.57

396 ft2

The largest county in the state of New York is St. Lawrence County which covers about 2,821 square miles.

Answer: 30 m² = 322.917 ft² OR 322 ft² and 132.0 in²

1

Answer: 2,500 acres = 12,100,000 square yards.