Classify the following triangle as acute, obtuse, or right

Option B

Step-by-step explanation:

The following picture is a example of a "right triangle" or option B. Right triangles have 90 degree angles and look like a L, if you rotate the triangle to its base you would see that the 90 degree angle looks like a L making it a right triangle. It's not option A because acute angles have to be smaller then 90 degrees in order for it to be acute, it's not obtuse because the angle has to be greater then 90 degrees in order to be a obtuse triangle.

Hope this helps.

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.