Final answer:
To find how much the temperature will drop by the end of a 24-hour day if it decreases by 3 degrees every 7 hours, you can use the expression (3/7) × 24, which equals approximately 10.29 degrees.
Step-by-step explanation:
The question asks how much the temperature will drop by the end of the day if it decreases by 3 degrees in 7 hours. To write an expression for the temperature decrease for a full day, we need to know how many hours are in 'the rest of the day.' For a typical day consisting of 24 hours, we can calculate the total decrease in temperature as follows:
If the temperature drops 3 degrees in 7 hours, then in 1 hour, it drops 3/7 degrees. Therefore, over 24 hours, the temperature would drop:
(3/7 degrees per hour) × (24 hours) = 10.29 degrees
So, the expression showing the temperature drop by the end of a 24-hour day would be:
(3/7) × 24
Note that the exact number can change if the 'end of the day' is defined differently in terms of hours remaining.