what are some examples of a rate?
speed of a car, how fast a cake bakes, how fast your sister grows, the speed of your grades going down if you start to not turn in homework.
Great examples! A rate is a measurement of something that changes over time. Here are the examples you mentioned broken down:
1. Speed of a car: If you want to calculate the rate of a car's speed, you need to measure the distance covered by the car over a specific time period. For instance, if a car traveled 100 miles in 2 hours, the rate of the car would be 50 miles per hour.
2. Baking time of a cake: The rate of the cake baking is measured by the time it takes for the cake to fully cook. If a cake takes 30 minutes to bake, the rate would be 1/2 hour per cake.
3. Growth rate of your sister: To determine the rate at which your sister is growing, you would need to measure her height periodically over time. For example, if she grows 2 inches every year, the rate of her growth would be 2 inches per year.
4. Speed of your grades decreasing: If you want to calculate the rate at which your grades are going down, you'd need to know how much your grades decrease over a specific period. For instance, if your grades drop by 5 points every time you miss a homework assignment, the rate would be 5 points per missed assignment.
In summary, rates are measurements that describe how something changes over time, and can be calculated by dividing the change in a quantity by the time it takes for that change to occur.