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 Question from Estela: what is exponential form of 9×1000

Hi Estela,

Exponential form means any form involving exponents so there are many correct answers to this. For example suppose the expression were $20 \times 100.$

Since $20 = 2 \times 10$ and $100 = 10 \times 10$ you could write this as

$20 \times 100 = 2 \times 10 \times 10 \times 10 = 2 \times 10^{3}.$

But $10 = 2 \times 5$ so you could also write

$20 \times 100 = 2 \times 2 \times 5 \times \left( 2 \times 5\right)^2 = 2^2 \times 5 \times 2^2 \times 5^2 = 2^4 \times 5^{3}.$

Penny

Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.