Which of the following is a criterion that must be met in order for an item to be recognized as an intangible asset?
the item is identifiable and lacks physical substance.
the item is part of the entity’s activities aimed at gaining new scientific or technical knowledge.
the item is expected to be used in the production or supply of goods or services.
the item’s fair value can be measured reliably.

The item is identifiable and lacks physical substance.

Explanation:

Intangible asset: Intangible asset is that asset which cannot be seen or even touched. It has no physical existence.

Example: Goodwill, patents, trademarks, copyrights and other intellectual properties

In these types of assets, amortization is charged instead of depreciation.  

It neither used for production, nor its gains any scientific or technical knowledge, and its value neither measure reliability

Hence, option a is correct  

bd = 9 cm

step-by-step explanation:

in a 30°-60°-90° triangle, the ratio of side lengths is 1 : √3 : 2. that is, the longest side (hypotenuse) is twice the length of the shortest side.

all of the triangles in your geometry are 30°-60°-90° triangles. ac is the hypotenuse of δacd, and the short side of δabc.

the short side ad of δacd will be half the length of ac, so 3 cm. the hypotenuse ab of δabc will be twice the length of ac, so 12 cm. segment bd is the difference of the lengths ab and ad, so is

bd = ab -ad

bd = 12 cm - 3 cm = 9 cm

comment on side length ratios

you can figure the ratios of side lengths in a 30°-60°-90° triangle by considering the trig ratios of the angles. or you can figure the length of the altitude of an equilateral triangle of side length 2 using the pythagorean theorem.

i would have to say its c