Use a single digit times a power of 10 to estimate the number 0.00002468.
Rounded to the nearest hundred thousandth,
the number is about
Written as a single digit times a power of ten,
the estimate is
x 10

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The sample proportion of highway bridges that need repaired is 0.6.

Step-by-step explanation:

The sample proportion of highway bridges that need repaired is the number of bridges in need of repair divided by the number of bridges around the country.

In this question:

75 bridges in need of repair, out of 125. So

75/125 = 0.6

The sample proportion of highway bridges that need repaired is 0.6.