Using a scientific calculator or graphing calculator find the inverse tangent of the ratio. Round to the nearest degree. 3/8 a.
21°
b.
22°
c.
68°
d.
37°

A

Step-by-step explanation:

I plugged 3/8 into an inverse tangent calculator and got this answer.

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.

i think the amount would be $140.62