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nadya68 [22]
2 years ago
7

Gloria can't get through the day without several cups of coffee and energy drinks. She says she needs the caffeine to function n

ormally. What type of drug is Gloria dependent on? Select one: a. Depressant b. Hallucinogen c. Narcotic d. Stimulant
Advanced Placement (AP)
1 answer:
pav-90 [236]2 years ago
4 0
D. Stimulant because caffeine stimulates the brain to have more energy in a short period of time.
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An architect makes a model of a new house. The model shows a tile patio in the backyard. In the​ model, each tile has length
STALIN [3.7K]

Answer:

Ratio = \frac{1}{16} ----- Model length to Actual length

Ratio = \frac{1}{256} ----- Model Area to Actual Area

Explanation:

Given

Model Measurement:

Length = \frac{1}{2}\ in

Width = \frac{1}{6}\ in

Actual Measurement:

Length = \frac{2}{3}\ ft

Width = \frac{2}{9}\ ft

Solving (a): Ratio of actual length to model length

Convert length from feet to inches

Length = \frac{2}{3}\ ft

Length = \frac{2}{3}\ * 12in

Length = \frac{24\ in}{3}

Length = 8\ in

The required ratio is calculated by dividing the model length by the actual length

Ratio = \frac{Model}{Actual}

Ratio = \frac{1}{2}\ in/8\ in

Ratio = \frac{1}{2}/8

Ratio = \frac{1}{2} * \frac{1}{8}

Ratio = \frac{1}{16}

Another possible way is to convert both measurement to a different unit:

Convert model length from inches to cm

Length = \frac{1}{2}\ in

Model\ Length = \frac{1}{2} * 2.54cm

Model\ Length = \frac{1 * 2.54cm}{2}

Model\ Length = \frac{2.54cm}{2}

Model\ Length = 1.27 cm

Convert actual length from ft to cm

Length = \frac{2}{3}\ ft

Actual\ Length = \frac{2}{3} * 30.48cm

Actual\ Length = \frac{2 * 30.48cm}{3}

Actual\ Length = \frac{60.96cm}{3}

Actual\ Length = 20.32cm

Then calculate the ratio as:

Ratio = \frac{Model}{Actual}

Ratio = \frac{1.27cm}{20.32cm}

Ratio = \frac{1.27}{20.32}

Simplify fraction

Ratio = \frac{1.27/1.27}{20.32/1.27}

Ratio = \frac{1}{16}

Solving (b): Model of Area;

Way 1:

In (a), we calculated the ratio of length to be:

Ratio = \frac{1}{16}

This is also the model of the width.

So, Ratio of Area is then calculated as:

Ratio = \frac{1}{16}^2

Ratio = \frac{1}{256}

Way (2): We calculate the actual area of the model and actual measurements.

Model Measurements

Length = \frac{1}{2}\ in

Width = \frac{1}{6}\ in

Area = Length * Width

Area = \frac{1}{2} * \frac{1}{6} in^2

Area = \frac{1}{12}\ in^2

Actual Measurements

Length = \frac{2}{3}\ ft

Width = \frac{2}{9}\ ft

Area = Length * Width

Area = \frac{2}{3} * \frac{2}{9} ft^2

Area = \frac{4}{27} ft^2

Convert to in^2

Area = \frac{4}{27} * 144in^2

Area = \frac{4}{3} * 16in^2

Area = \frac{64}{3}in^2

Ratio is then calculated as:

Ratio = \frac{Model}{Actual}

Ratio = \frac{1}{12}/\frac{64}{3}

Ratio = \frac{1}{12} * \frac{3}{64}

Ratio = \frac{1}{4} * \frac{1}{64}

Ratio = \frac{1}{256}

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Climate change in the world can be caused by various activities. When climate change occurs; temperatures can increase a dramatically. When temperature rises, many different changes can occur on Earth. For example, it can result in more floods, droughts, or intense rain, as well as more frequent and severe heat waves. Oceans and glaciers have also experienced some changes: oceans are warming and becoming more acidic, glaciers are melting, and sea levels are rising. As these changes frequently occur in future decades, they will likely present challenges to our society and environment.

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Global warming has really taken effect in the world over the last century. It is the unusually rapid increase in the Earth’s average surface temperature over the past century primarily due to the greenhouse gases released as people burn fossil fuels. Global warming is due to the enhancing greenhouse gases emission and build-up in the Earth’s environment. The gases that have an influence on the atmosphere are water vapor, carbon dioxide, dinitrogen-oxide, and methane. Almost 30 percent of incoming sunlight is reflected back into space by bright surfaces like clouds and ice. In the other 70 percent, most is absorbed by the land and ocean, and the rest is absorbed by the atmosphere. The absorbed solar energy heats our planet. This absorption and radiation of heat by the atmosphere is beneficial for life on Earth. Today, the atmosphere contains more greenhouse gas molecules, so more of the infrared energy emitted by the surface ends up being absorbed by the atmosphere. By increasing the concentration of greenhouse gases, we are making Earth’s atmosphere a more efficient greenhouse. Climate has cooled and warmed throughout the Earth history for various reasons. Rapid warming like we see today is unusual in the history of our planet. Some of the factors that have an effect on climate, like volcanic eruptions and changes in the amount of solar energy, are natural. Climate can change if there is a change in the amount of solar energy that gets to the Earth. Volcano eruptions can really affect climate, because when it erupts it spews out more than just lava and ash. Volcanoes release tiny particles made of sulfur dioxide into the atmosphere. These particles get into the stratosphere and reflect solar radiation back out to space. Snow and ice also have a great effect on climate. When snow and ice melts Earth’s climate warms, less energy is reflected and this causes even more warming. There are many different ways that plants, animals, and other life on our planet can affect climate. Some can produce greenhouse gases that trap heat and aid global warming through the greenhouse effect.

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