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

Correct 241.34(3 x 10-3)2 to 4 significant figures
  • A.
    0.0014
  • B.
    0.001448
  • C.
    0.0022
  • D.
    0.002172
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)

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