If an isotope has a half-life of 4 billion years, then in 4 billion years what will happen?
a. All of the original amount will have decayed.
b. A quarter of the original amount will still remain.
c. Half of the original amount will still be present.
d. All of the original amount will still be present.
e. The original amount will have doubled.
c
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If a 10 percent increase in price leads to a 15 percent decrease in the quantity demanded of the good, as a result of the price change, the total revenue for this product will ________.
A) decrease B) not change C) double D) increase
Graphic and plastic arts include painting, sculpture, and architecture, but not embroidery, weaving, or tattooing
a. True b. False
Tourism is an important aspect of the economy of the Hui Muslims of Xi'an, China
Indicate whether the statement is true or false.
Physical anthropologists are interested only in the study of biological systems
a. True b. False Indicate whether the statement is true or false