Scientists Use the Rule of 707070 to Calculate Human Population Growth

Explanation The rule of 70 is used to find the approximate doubling time in years. The rule of 70 uses the equation 70 divided by the growth rate per year. In this case, with a population growth rate

The Mystery of the Circle's Diameter

Understanding the Circumference The circumference of a circle is 43.96 kilometers. To find the diameter of the circle, we need to perform some calculations based on the given data. Calculating the Dia

The Mystery of Stars: Let's Explore the Universe!

What causes the brightness of stars to vary? A: The stars are shrinking B: Gravity is constantly pulling them together C: The sun is rising D: It's a meteor shower Answer: The correct answer is B: Gra

My kitchen clock mystery

What is the mystery behind the discrepancy in time between the two clocks and how can it be solved? The student's question requires calculations related to time, including adding and subtracting measu

The Fascinating World of AP World History

How many multiple-choice questions are there on the AP World History exam? A. 55 B. 70 C. 100 D. 120 Answer: The correct answer is B. 70 multiple-choice questions. AP World History exam consists of 70

How to Stay Healthy with 5 Simple Tips

What are the 5 simple tips to stay healthy? 1. Eat a balanced diet 2. Exercise regularly 3. Get enough sleep 4. Stay hydrated 5. Practice good hygiene 5 Simple Tips to Stay Healthy: 1. Eat a balanced

Three Major Business Types Ranking

What is a business structure? A business structure can be defined as the category of businesses that is legally recognized and it influences its day-to-day operations or daily activities. Answer: A ra