A firefighter places a 13 ft. ladder against the wall of a burning building. IF the bottom of the ladder is 5 ft from the base of the building, how far up the building will the ladder reach?​

Explanation:

we will use pythagoras theorem

a² + b² = c²

according to the given data we'll assume that

a = 5

c = 13

5²+b²=13²

25+b²=169

b²=169-25

b²=144

b=√144

b=12

It would be 12ft because if you do the certain math, concluding that you'll be using the 5 and the 13 it will lead to 12

find out the value of b

step-by-step explanation:

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.