Use the formula time = distance/speed.
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tỷ số và tỷ lệ 2in1
- Define ratio.
- State the theorem relating the areas of similar figures. If two solids are similar, and the ratio of their corresponding linear dimensions is 1 4, what is the ratio of their volumes?
- Explain how unit ratios are used in conversions.
- Give an example of a direct proportion. If y is directly proportional to x, and y = 10 when x = 2, find y when x = 5.
- Describe the difference between absolute and relative change. If a quantity is increased by 25%, what is the new quantity as a ratio of the original quantity?
- What are the foundational roles of these concepts? Consider real-world scenarios where ratios might be misleading if not interpreted carefully (e.g., comparing crime rates in cities with different populations).
- Explain the practical significance of the miles per gallon unit rate. Percentages, Ratios, and Proportions
- Explain how to perform currency conversions using ratios. A company's profits are shared among three partners in the ratio 3 5 7. If the total profit is $45,000, how much does each partner receive?
- Explain how to calculate the quantities of components in a mixture. A concrete mixture contains cement, sand, and gravel in the ratio 1 2 4. If 14 cubic meters of concrete are needed, how much of each ingredient is required?
- Explain how the speed of the current affects the upstream and downstream speeds. The ratio of the speeds of a car and a bus is 2 3. If the car takes 5 hours to travel a certain distance, how long will the bus take to travel the same distance?
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