Solve.A fossilized leaf contains 18% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use 5600 years as the half-life of carbon 14.
A. 23,309
B. 1600
C. 35,538
D. 13,829
Answer: D
Mathematics
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Provide an appropriate response. Describe the similarities and differences between a rectangle, a square and a parallelogram.
What will be an ideal response?
Mathematics
Write the following proportion.40 is to 5 as 104 is to 13
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Mathematics
Solve the problem.A piece of cardboard is 0.04 in. thick. The cardboard is cut in half, with one half being placed on top of the other so that its thickness doubles for 7 times in a row. How thick would the final stack of cardboard be? Round to two decimal places.
A. 2.56 in. B. 7.26 in. C. 4.41 in. D. 5.12 in.
Mathematics
Evaluate the expression.
?
?
A. 
B. 
C. 
D. 
Mathematics