In what way was communication by telegraph an improvement over communication by mail carriage?
a. the telegraph allowed instant communication over long distances.
b. the telegraph used morse code.
c. the telegraph let messages be delivered in days instead of weeks.
d. the telegraph carried the sounds of people’s voices.

The telegraph was once a revolutionary innovation in the way the mail was sent. It represents the instant transmission of textual or symbolic messages over long distances. The original ways of transmitting a message remotely without carrying the message were visual semaphores as initial forms of telegraphy. Later the telegraph was significantly improved by the invention of electric telegraphs which, using the symbolic code, could transmit the encrypted message over long distances.

The answer is: A.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

immigrants from northern and western europe continued coming as they had for three centuries, but in decreasing numbers