On a quiz, there are 5 true-false questions. wiria guesses on all 5 questions. what is the probability that he gets all 5 questions right?

Since it is a true-false question, there are only 2 possibilities. Either it is true or it is false.

The total surface area for the figure shown will be calculated as follows: sa is the total area of every surface in the figure, thus we shall have: sa=(20×10)+2×(9×20)+(12×10)+2×(15×8)+(15×10)+(24×10)+(10×8)sa=200+2(180)+120+2(120)+150+240+80sa=200+360+120+240+150+240+80sa=1390 in²