I think it’s D sorry If I’m wrong
You need to move the decimal point between the six and nine. 6.9 X 10^-4
Answer:
Explanation:
One prolonged blast every two minutes is an indication of incoming of a power-driven vessel underway. This blast is done to make aware other boats, about your location, in the conditions of poor visibility. The other boats will have to slow down their speed, in order to avoid collision.
