I WILL MARK BRAINLIEST!! Objective
In this activity, you will

make sense of problems and solve them
reason abstractly and quantitatively
construct viable arguments and analyze the reasoning of others
use mathematics to model real-world situations
use appropriate tools strategically
attend to precision, look for and make use of structure
look for and express regularity in repeated reasoning

Introduction
The formula for finding the volume of a square pyramid isIn the formula, V stands for volume, h stands for height, and s stands for the length of each side of the base.

In this activity, you will use this formula to approximate the side lengths of two pyramids in Egypt. Then you will determine the side length needed to create models of the pyramids.
Evaluation
Your teacher will use this rubric to evaluate the completeness of your work as well as the clarity of thinking you exhibit.

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

the correct answer would be the third option