gladysellis09 gladysellis09
  • 22-05-2019
  • Mathematics
contestada

what is the difference of scientific notation. 0.00067 - 2.3 x 10^-5

A. 6.47 x 10⁻⁴

B. 6.47 x 10⁻⁵

C. 4.4 x 10⁻⁵

D. 4.4 x 10¹

Respuesta :

zainabdallah zainabdallah
  • 22-05-2019

Answer is letter A

it is the answer

Answer Link
carlosego
carlosego carlosego
  • 22-05-2019

For this case we must find the difference of the following expressions:

[tex]0.00067\\2.3 * 10 ^ {- 5}[/tex]

For the second expression we must run the decimal 5 times to the left, because the exponent is negative, that is:

[tex]0.000023[/tex]

We subtract:

[tex]0.00067-0.000023 = 0.000647[/tex]

Represented in scientific notation we have:

[tex]6.47 * 10 ^ {- 4}[/tex]

Answer:

Option A

Answer Link

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