A.\(B = \dfrac{9}{2}\)
B.\(B = \dfrac{{11}}{2}\)
C.\(B = \dfrac{{13}}{2}\)
D.\(B = \dfrac{{15}}{2}\)

A.\(A = 14\sqrt 5  - 15\)
B.\(A = 12\sqrt 5  - 15\)
C.\(A = 10\sqrt 5  - 8\)
D.\(A = 12\sqrt 5  - 8\)

A.\(V = \dfrac{4}{3}\pi {a^3}\)
B.\(V = \dfrac{{32}}{3}\pi {a^3}\)
C.\(V = 4\pi {a^3}\)  
D.\(V = 8\pi {a^3}\)

A.\(S = \dfrac{1}{2}\pi {a^2}\)
B.\(S = 4\pi {a^2}\)
C.\(S = \pi {a^2}\)   
D.\(S = 2\pi {a^2}\)

A.\(V = 3{a^3}\)
B.\(V = 6{a^3}\)
C.\(V = {a^3}\)
D.\(V = 2{a^3}\)

A.\(\tan \angle ACB = \dfrac{5}{3}\)
B.\(\tan \angle ACB = \dfrac{3}{5}\)
C.\(\tan \angle ACB = \dfrac{4}{5}\)
D.\(\tan \angle ACB = \dfrac{3}{4}\)

A.\(7\)
B.\(73\)
C.\(-7\)
D.\(-3\)

A.\(x > 3\)
B.\(x \ge 0\)
C.\(x \ge 0\) và \(x \ne 3\)  
D.\(x \ne 3\)

A.\(0\)
B.\(1\)
C.\(2\)
D.\(3\)

A.\(m =  - 1\)
B.\(m = 1\)
C.\(m = 0\)
D.\(m = \dfrac{1}{2}\)