Respuesta :

To find this answer you find the percent of change.
To do this you divide the difference in lengths by the starting length. We start with the main bridge.

4700-2300=2400
2400/4700 is about 51.1% shorter.
fichoh

The main span of bridge A is 51.1% shorter than the main span of bridge B.

Span of bridge A = 2300 feets

Span of bridge B = 4700 feets

Percentage difference in span length :

[(difference in span) / span of B] × 100%

Difference in span = 4700 - 2300 = 2400

Percentage difference = (2400 ÷ 4700) × 100%

Percentage difference = 0.5106 × 100% = 51.1%

Therefore, the main span of bridge A is 51.1% shorter than the main span of bridge B.

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