Answer:
millimeters.
Explanation:
We have been given that a leak in a water tank causes the water level to decrease by
millimeters each second.
To find the decrease in water level in 5 hours let us multiply water decrease in one second by number of seconds in 5 hours.

Using the exponent product rule let us add the exponents with same base (10).


Therefore, the water level in tank decreased
millimeters in 5 hours.