Biology, 29.12.2019 12:31 ramandeep

Achurch spire in a form of a regular hexagonal pyramid whose base edge is 8ft and whose altitude is 75ft is to be painted at a cost of 22 dollars per sq. yard. what is the total cost?

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Answer from: niasheffield65

The total cost is $4825.19.

Explanation:

Given information:

Base edge = 8 ft

Height = 75 ft

The surface area of a regular hexagonal pyramid is

$Area=\frac{3\sqrt{3}}{2}a^2+3a\sqrt{h^2+\frac{3a^2}{4}}$

where, a is base edge and h is height.

Substitute a=8 and h=75 in the above formula.

$Area=\frac{3\sqrt{3}}{2}(8)^2+3(8)\sqrt{(75)^2+\frac{3(8)^2}{4}}$

$Area=\frac{3\sqrt{3}}{2}(64)+3(8)\sqrt{5625+48}$

$Area\approx 166.28+1807.66$

$Area\approx 1973.94$

The area of regular hexagonal pyramid is 1973.94 sq. ft.

We know that

1 sq. yard = 9 sq. ft

The area of regular hexagonal pyramid in square yard is

$\frac{1973.94}{9}\approx 219.3267$

It is given that cost of paint is 22 dollars per sq. yard. So, total cost is

$\text{Total cost}=219.3267\times 22=4825.1874\approx 4825.19$

Therefore the total cost is $4825.19.

Answer from: Quest

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

Answer from: Quest

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."

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