answer:Incorrect. Pi (π) is an irrational number, as it cannot be expressed as a simple fraction (two integers divided by each other). The fraction 22/7 is an approximation of pi, not its exact value.,Incorrect. While 22/7 is sometimes used as an approximation of pi, pi is actually an irrational number, meaning it cannot be expressed as a simple fraction. Its decimal representation goes on infinitely without repeating., The statement is incorrect. While it is true that Pi can be approximated as 22/7, this does not mean Pi is a rational number. A rational number is any number that can be expressed as the quotient or fraction p/q of two integers, where the denominator q is not equal to zero. However, Pi is a unique and transcendental number, which means it cannot be precisely represented as a finite fraction, nor as a repeating decimal. Instead, its value is approximately equal to 3.14159, and this approximation can be expressed as a ratio like 22/7, but Pi itself is not rational.

answer:The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. These gases include water vapor, carbon dioxide, methane, nitrous oxide, and others. They trap heat in the atmosphere, keeping the Earth's surface warmer than it would be without these gases. This is similar to how a greenhouse works: sunlight enters through the glass, warming the inside of the greenhouse, but the heat can't escape as easily, causing the temperature to rise. However, human activities, particularly the burning of fossil fuels and deforestation, have significantly increased the concentration of these greenhouse gases in the atmosphere. This enhanced greenhouse effect is leading to additional warming, which can have various impacts on the climate and environment, such as rising sea levels, changing weather patterns, and impacts on biodiversity.,The greenhouse effect is a natural process that maintains Earth's temperature by trapping heat, making the Earth warm enough to sustain life. Greenhouse gases, such as carbon dioxide, methane, and water vapor, absorb and retain the sun's heat, preventing it from escaping into space. This trapping of heat, similar to how a greenhouse retains heat and enables plants to grow inside, is the greenhouse effect. As human activities contribute to an increase in greenhouse gas emissions, the balance of the natural greenhouse effect can be disrupted, leading to global warming and climate change.,The greenhouse effect is a natural process in which certain gases, known as greenhouse gases (including carbon dioxide, methane, and water vapor), trap heat in the Earth's atmosphere. These gases allow sunlight to pass through and warm the Earth's surface, but then absorb and re-radiate this heat back toward the Earth, preventing it from escaping into space. This trapped heat contributes to the planet's overall temperature, and the enhanced greenhouse effect due to human activities like burning fossil fuels leads to global warming and climate change.

answer:Based on the information provided, it does not seem rational for Jane to continue her investment in the stock. The stock has underperformed the market, its sector, and its competitors over the past three years. Moreover, Jane's financial advisor, who has a good track record, has recommended that she sell the stock. Therefore, it is likely that the stock is not a good investment and Jane could benefit from divesting and investing in a different stock that has better prospects. However, Jane should consider her investment goals, risk tolerance, and other factors before making a decision.,No, it is not rational for Jane to continue her investment in the stock, considering its consistent underperformance and her financial advisor's recommendation.,Based on the provided information, it is not rational for Jane to continue her investment in the stock. The stock has consistently underperformed the market and her financial advisor has recommended that she sell it, suggesting that there is no reason to believe the situation will improve. Following her financial advisor's advice would be the rational action in this case.

answer:The primary cause of the accident is Alex's excessive driving speed in snowy conditions and low visibility.,The primary cause of the car accident is the combination of poor visibility due to snowy weather, Alex driving at a speed of 70 mph, which was faster than the posted speed limit of 45 mph, and Jack's decision to overtake a car while leaving an insufficient distance of only 30 feet between their vehicles. These factors contributed to the unsafe situation and, therefore, the accident., Based on the given information, the primary cause of the car accident appears to be a combination of excessive speed by Alex and Jack's improper lane change. Alex was driving at 70 mph in a 45 mph zone, which is a significant violation of the speed limit. This excessive speed reduced the time and space Alex had to react to Jack's sudden lane change. On the other hand, Jack's decision to overtake another car by entering the lane without ensuring sufficient distance from other vehicles also contributed to the accident. He left only 30 feet between his car and Alex's, which is generally considered too close for safe driving, especially under poor visibility conditions. Therefore, both drivers' actions played a role in causing the accident. However, it's important to note that driving at an excessive speed in poor weather conditions is a serious traffic violation and can lead to severe accidents.