While learning to measure in hundredths of an inch, you stack up some coins and find that they are 5.87 inches tall. You add these coins to a stack that is already 1.98 inches tall. What is the total height of the coins now?

To find the total height of the coins, you need to add the height of the first stack to the height of the second stack.

1.98 inches + 5.87 inches = 7.85 inches

Therefore, the total height of the coins is 7.85 inches.