How do you evaluate #8.1 \times10^ { 4} - 21\times 10^ { 3}#?

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Answer 1 · 2017-10-07T02:47:47

See a solution process below:

We can rewrite #21 xx 10^3# as: #2.1 xx 10^4#

We can therefore rewrite the expression and factor common terms:

#8.1 xx 10^4 - 21 xx 10^3 =>#

#8.1 xx 10^4 - 2.1 xx 10^4 =>#

#(8.1 - 2.1) xx 10^4 =>#

#6.0 xx 10^4#

We can write this in standard form as:

#60,000#