(34.123+9.30)/(98.7654-5.108)

0.4636.

Explanation:

Hello!

In this case, when performing mathematical operations with number having different significant figures, we first resolve the problem without fixing the significant figures:

(34.123+9.30)/(98.7654-5.108) = 0.463637

However, the result should be shown with 4 significant figures due to the fact that the addition 34.123+9.30 is equal to 43.42 because the 9.30 is significant to the hundredths; therefore, the correct result is:

0.4636.

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the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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