Answer:
12.3 meter.
Step-by-step explanation:
Mischa dives from a platform that is 10 meters above the water.
Her dive takes her 2.3 meters below the surface of the water.
The total distance of Mischa's dive take her = 10 + 2.3
= 12.3 meters.
Mischa's dive takes her 12.3 meter.