Solve the problem.Assume that the half-life of Carbon-14 is 5700 years. Find the age (to the nearest year) of a wooden axe in which the amount of Carbon-14 is 30% of what it originally had.
Fill in the blank(s) with the appropriate word(s).
9901 years
Mathematics
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Express the rational number as a terminating or repeating decimal number.
A. 0.
B. 0.
C. 0.
D. 0.
Mathematics
Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Mathematics
Use rational exponents to simplify. Do not use fraction exponents in the final answer. Assume that even roots are of nonnegative quantities.
8
A. 
B. 3x2
C. 
D. 3x8
Mathematics
Insert parentheses as needed in the expression in order to make it equal to 0. More than one set of parentheses may be needed.72 ÷ 4 + 3 - 7
A. 72 ÷ 4 + 3 - 7 B. 72 ÷ (4 + 3) - 7 C. (72 ÷ 4) + 3 - 7 D. 72 ÷ 4 + (3 - 7)
Mathematics