Final answer:
To find the average household credit card debt in 2013, calculate 407 times 18 plus 5370, which equals $12,696.
Step-by-step explanation:
To calculate the total average credit card debt for a U.S. household in the year 2013 using the given expression, we need to determine the value of t, which represents the number of years after 1995. Since 2013 is 18 years after 1995 (2013 - 1995 = 18), we plug t = 18 into the expression to get 407t + 5370.
Now, let's compute: 407 × 18 + 5370 = 7326 + 5370 = 12696.
In the year 2013, the total average credit card debt for a U.S. household was $12,696.