Correct 241.34(3 x 10-3)2 to 4 significant figures

Correct 241.34(3 x 10^-3)² to 4 significant figures

Correct Answer: Option D

Explanation

first work out the expression and then correct the answer to 4 s.f = 241.34…………..(A)
(3 x 10³)²…………(B)
= 3²x
= (frac{1}{10^3}) x (frac{1}{10^3})
(Note that x² = (frac{1}{x^3}))
= 24.34 x 3² x (frac{1}{10^6})
= (frac{2172.06}{10^6})
= 0.00217206
= 0.002172(4 s.f)