The display on a calculator screen is shown2.119188EE-8. What number does the calculator represent

  0.00000002119188

Step-by-step explanation:

If you enter this number into a spreadsheet (with a single E), you can set the display format to show you the value in standard form. The exponent (E) of -8 indicates the most-significant digit (2) is in the 8th place to the right of the decimal point:

  = 2.119188×10^-8

  = 0.00000002119188

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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