Marina is hiking. On Monday she hiked 4.78 mi, and on Tuesday she hiked 7.8 mi. How many total miles did she hike?

To find the total miles hiked, we need to add the distance hiked on Monday (4.78 mi) to the distance hiked on Tuesday (7.8 mi).

Total miles hiked = 4.78 mi + 7.8 mi = 12.58 mi

Therefore, Marina hiked a total of 12.58 miles.

To find the total miles Marina hiked, you can add the distances she hiked on Monday and Tuesday.

Distance hiked on Monday = 4.78 mi
Distance hiked on Tuesday = 7.8 mi

Total distance = Distance hiked on Monday + Distance hiked on Tuesday
= 4.78 mi + 7.8 mi
= 12.58 mi

Therefore, Marina hiked a total of 12.58 miles.

To find the total number of miles that Marina hiked, you need to add the distances she hiked on Monday and Tuesday.

First, add 4.78 mi (the distance hiked on Monday) and 7.8 mi (the distance hiked on Tuesday).

4.78 + 7.8 = 12.58

Therefore, Marina hiked a total of 12.58 miles.