Which of the following inventions were developed by thomas edison?
a. typewriter, refrigerated rail car, automatic engine-oiling machine
b. motor-driven vacuum cleaner, cash register, milking machine
c. motion picture projector, electric power plant, phonograph
d. electric streetcar, passenger elevator brake, shoemaking machine

The correct answer is:

C. motion picture projector, electric power plant, phonograph

Explanation:

Thomas Edison (1847 -1931) was an American inventor and businessman that made huge contributions to the world.

Although he was not the first to invent the light bulb, he is known as the inventor of the modern light bulb. He was the first to develop the electric power plant, which helped to bring light bulbs to entire cities. This invention was the foundation of the Edison Illuminating Company. Edison also invented the phonograph, the universal stock printer and the Kinetograph (which was the first motion picture projector).

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

the answer is d the rejection of the olive branch petition.

explanation:

the olive branch petition was an attempt to state the rights of the colonists while keeping their loyalty to the british crown. hope this !

by kd