The diagram here provides information on when the fossils of certain organisms are found in the fossil record. Which of the following conclusions can be drawn from the data in the diagram?

A. Ammonites did not appear until after fems,
B. Gastropods existed for a very short time,
C. Trilobites and ammonites never existed at the same time.
D. Cnnoids and ammonites
compete for space.

NEED HELP ASAP

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

This is the substance(s) formed in a chemical reaction.

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?