A.\(4\,c{m^2}.\)
B.\(3\,c{m^2}.\)
C.\(12\,c{m^2}.\)
D.\(9\,c{m^2}.\)

A.\(49\,c{m^2}\).
B.\(48\,c{m^2}\).
C.\(77\,c{m^2}\).
D.\(67\,c{m^2}\).

A.\(y = 220\).
B.\(y = 320\).
C.\(y = 250\).
D.\(y = 210\).

A.1,12.
B.1,68.
C.2,24.
D.3,36.

A.2
B.3
C.4
D.5

A.60,32.
B.60,84.
C.68,20.
D.68,36.

A.1
B.2
C.3
D.4

A.4,0.
B.4,6.
C.5,0.
D.5,5.

A.0,16 mol
B.0,18 mol.
C.0,21 mol.
D.0,19 mol.

A.46,98%.
B.41,76%.
C.52,20%.
D.38,83%.