A piece of charcoal is found to contain 30% of the carbon 14 that it originally

had. When did the tree die from which the

charcoal came? use 5600 years as the

half-life of carbon 14.

A) 9709.46

B) 9708.33

C) 9708.34

D) 9709.45

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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answer7,570,82356 cubic centimeters;

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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