What is the difference between mold and cast fossils? A Mold fossils fom from collected minerals and cast fossils do not B. Mold fossils are impressions intock and cast fossils fomm from minerals filling molds cast fossils are impressions Into rock and mold fossils form from minerals filling casts Cast fossils are formed in sedimentary rock but mold fossils are not​

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.

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.