Describe why echo sounding is better method of mapping the ocean floor than lead weight on the line.

ANSWER:

Echo sounding is a better way of mapping ocean floors because this method can be used to measure larger depths of the ocean.

EXPLANATION:

This method of mapping, the 'depth of the ocean' uses sound waves to send and receive signals from depths of ocean enabling accurate mapping. The lead weight on line method can also be used for mapping ocean floor but this method is better for up to 50 meters of depth. For greater depths, the lead weight method does not give exact results.

5×^2+20-15 or -(5x^2-20+15)

A,f, g are the points