Solve the problem.A fossilized leaf contains 12% 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. 36,108
B. 1031
C. 17,099
D. 20,040
Answer: C
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Solve the problem. Round your result to an appropriate number of significant digits.Raul, who is 1.98 m tall, wishes to find the height of a tree. He walks 18.87 m from the base of the tree along the shadow of the tree until his head is in a position where the tip of his shadow exactly overlaps the end of the tree top's shadow. He is now 5.77 m from the end of the shadows. How tall is the tree? Round to the nearest hundredth.
A. 2.85 m B. 0.605 m C. 8.46 m D. 6.48 m
Graph the parabola whose equation is given.y = x2 + 8x + 7
A. 
B. 
C. 
D. 
Translate the statement into a mathematical equation.When 2 times a number is subtracted from 7 times the number, the result is 55.
A. 2(x - 7) = 55x B. 7x - 2x = 55 C. 2x + 11x = 55 D. 2x(7 - x) = 55
Choose the inequality that best matches the shaded graph.
A. y ? -x + 1 B. y ? 2x + 2 C. y ? 2x + 2 D. y ? x - 1