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Which answer is closest to the true value of the expression:
(9.1 x 10⁴)(1.1 x10^{-5})(log10^{-13})(1000)
(a) 1.3 
(b) 13000 
(c) -13000 
(d) 1.3 x 10^{-11}
Can anyone explain this one?

Sagot :

[tex](9.1\times10^4)(1.1\times10^{-5})(log10^{-13})(1000)\\\\=(9.1\times1.1)(10^4\times10^{-5}\times10^3)(-13log10)\\\\=10.01\times10^{4-5+3}(-13)\\\\=-130.13\times10^2\\\\=-13013\approx-13000\\\\Answer:(c).[/tex]
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