Mathematics: In 2005, 8.1x10^10text messages were sent in the united states. in 2010, the number of annual text messages had risen to 1,863,000,000,000. about how many times as great was the number of text messages in 2010 then 2005?

The answer of seven-tenths in whole form is 70 out of 100...

In 2005, 8.1x10^10text messages were sent in the

Ответ:

drewefielder6198

11.03.2022

Mathematics

You must divide the number of text messages in 2010 by the number of text messages in 2005.

Convert the number of text messages in 2010 to scientific notation:

$1\underbrace{,863,000,000,000}_{\leftarrow12}=1.863\cdot10^{12}$

Divide:

$(1.863\cdot10^{12})\div(8.1\cdot10^{10})=\dfrac{1.863\cdot10^{12}}{8.1\cdot10^{10}}=\dfrac{1.863}{8.1}\cdot10^{12-10}\\\\=0.23\cdot10^2=0.23\cdot100=23$

23 many times.

Used:

$a^n:a^m=a^{n-m}$

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In 2005, 8.1x10^10text messages were sent in the united states. in 2010, the number of annual text messages had risen to 1,863,000,000,000. about how many times as great was the number of text messages in 2010 then 2005?

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