How many arrangements of answers are possible for a a. true b. false test with 10 questions?

Which symbol makes the steam in true 0.7 > 0.77

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

Which best explains why this triangle is or is not a right triangle?