The cross section of a water bin is shaped like a trapezoid. The bases of the trapezoid are 13 feet and 9 feet long. It has an area of 55 square feet. What is the height of the cross section? HELP

the answer is 5 feet

Step-by-step explanation:

(13+9)/2=11

55/11=5

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 that you should ask google for the answer to that problem because if we don't know it google does