What part of he wave is labeled with an A. 1) Amplitude

2) Wavelength

3) Crest

4) Trough

(Never mind I figured out it's wave length)

i don't know. the other person does though.

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .