The delivery of medical care in preindustrial America was governed mainly by: A. free-market conditions. B. professionalization of medical care. C. high barriers to entry. D. collusion among providers.

A. free-market conditions.

Explanation:

Free market are the condition in the market, which is not governed by the government and people are free to exchange their goods and services with others and market are solely operated by the law of demand and supply. Government does not interfere in the functioning of market and market is regulated by private players or entrepreneur.

Following are the disadvantages of free market condition:

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.