In 1849,six large New York papers, including the Sun, Herald, and Tribune, decided to pool efforts and share expenses in collecting news from foreign ships docking at the city's harbor. In doing so they established the first .
A) penny press.
B) yellow tabloid.
C) wire service.
D) syndicate.

C) wire service

Explanation:

A wire service is an organization that makes news available to their customers via satellite transmission or by wire. Such organization gather news and send it out electronically. Examples includes Reuters UK, BNO news Netherlands, Canadian press, Press Association in USA, Korea news in South Korea etc.

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.

answer; depth;