All the options are correct.
If we look at the formula of prismoidal, we can see that it contains, three areas = area of faces at top and bottom and area of midway section
Thus it can be used to calculate the a) calculate surface area for cylindrical rings And b) estimate the surface area of edged non-prismoidal solids.
In the volume formula of prismoidal, the factor (depth/6) is multiplied by the three areas as mentioned above, this gives the volume of faces at top and bottom and midway section. Thus option C and D are also correct.
The answer to the question is 5.0
In 1880, coal powered a steam engine attached to the world's first
electric generator. Thomas Edison's plant in New York City provided the
first electric light to Wall Street financiers and the New York Times.Only a year later, the world's first hydroelectric plant went on-line in Appleton, Wisconsin.By the late 1800s, a new form of fuel was catching on: petroleum.With the low-cost automobile and the spread of electricity, our
society's energy use changed forever. Power plants became larger and
larger, until we had massive coal plants and hydroelectric dams. Power
lines extended hundreds of miles between cities, bringing electricity to
rural areas during the Great Depression.(this is just a brief description)
