Solve.A fossilized leaf contains 34% of its normal amount of carbon 14. How old is the fossil? Use 5600 years as the half-life of carbon 14 and round to the nearest year.

A. 33,788 yr
B. 28,438 yr
C. 8700 yr
D. 3351 yr


Answer: C

Mathematics

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Solve the problem.The following figure shows the shape and dimensions of a small dam. Assuming the water level is at the top of the dam, find the total force on the face of the dam. 

A. 25,401,600 N B. 47,628,000 N C. 38,102,400 N D. 1,587,600 N

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Sketch by hand the graph of the function. Give the coordinates for the vertex.y = x2 - 4

A. vertex: (-4, 0)

B. vertex: (0, 4)

C. vertex: (0, -4)

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Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.

A. 6 
B. 6 
C. 7 
D. 6 

Mathematics