Answer:
no need to prove ,I believe you
Step-by-step explanation:
i believe you
The angle is 90 degree...
Add all the numbers on the shape until you get your answer
Answer: 
Step-by-step explanation:
When the scientists detect a signal frequency from the ocean floor, then the depth of submarine =
feet
=
feet
When they dive farther to check the signal, then the depth of the submarine=
feet.
The net change in their elevation =
