Final answer:
The expression representing the situation where a whale dives at a rate of 6 feet per second for 20 seconds is 'Total Depth = 6 feet/second x 20 seconds', resulting in a total diving depth of 120 feet.
Step-by-step explanation:
The situation described involves a whale diving at a constant rate into deeper water. The rate at which the whale dives is 6 feet per second, and the total time this action continues is 20 seconds. To represent this situation, we need an expression that calculates the total depth the whale dives. The expression will therefore be the rate multiplied by the time.
Expression: Total Depth = Rate × Time
Using the given rate and time, the expression representing the total depth the whale dives is:
Total Depth = 6 feet/second × 20 seconds
This expression shows that for every second the whale dives, it goes 6 feet deeper. After 20 seconds, you can calculate the total depth by multiplying the rate by the time.
Calculate the total depth:
Total Depth = 6 × 20 = 120 feet
Therefore, the whale dives a total of 120 feet into the water after 20 seconds.