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Zinaida [17]
3 years ago
6

In a recent year, there was about 400,000,000 mobile internet users. ( look at the picture )​

Mathematics
2 answers:
STatiana [176]3 years ago
8 0
3 times as many or 3:1
AVprozaik [17]3 years ago
7 0

\bf 400,000,000\implies 4\times 10^8 \\\\[-0.35em] ~\dotfill\\\\ \cfrac{\textit{desktop users}}{\textit{mobile users}}\qquad \qquad \cfrac{1.2\times 10^9}{4\times 10^8}\implies \cfrac{12\times 10^8}{4\times 10^8}\implies \cfrac{12}{4}\times\cfrac{10^8}{10^8}\implies \cfrac{3}{1}

3 : 1, or 3 to 1, thus 3 times as many.

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If we draw this out, we'll see that there are actually two similar right triangles (see attachment), which means that we can set up a proportion.

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