#### Answer

(a) 0.121

#### Work Step by Step

Multiply (43.998$\times$ 0.00552)
S.F rule: the zeros at front don't count.
0.00552 has 3 S.F, which is the least S.F.
(43.998$\times$ 0.00552)=0.24286896... round the number at the end.
0.24286896...$\div$ 2.002=0.121313...
The least S.F is 3, so we round the number as 0.121