An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (1)
The problem states that the total cost ( c ) is $14 times the number of hours ( h ).
We express this relationship as an equation.
The equation is c = 14 h .
Therefore, the correct equation is c = 14 h .
Explanation
Understanding the Problem The problem states that the total cost to rent a row boat is $14 times the number of hours the boat is used. We need to write an equation to model this situation, where c represents the total cost and h represents the number of hours.
Formulating the Equation Since the total cost ( c ) is $14 times the number of hours ( h ), we can write the equation as: c = 14 × h c = 14 h
Final Equation Therefore, the equation that models the situation is c = 14 h .
Examples
Imagine you are renting a row boat for a fun day at the lake. The rental company charges a fixed rate per hour. If the rate is $14 per hour, you can use the equation c = 14 h to calculate the total cost of renting the boat for any number of hours. For example, if you rent the boat for 3 hours, the total cost would be c = 14 × 3 = $42 . This equation helps you budget your expenses and plan your day accordingly.
