Tests of an artifact discovered at the Debert site in Nova Scotia show that 25% of the original 14 C is still present. What is the probable age of the artifact? (Use r = -1.20968 ´ 10-4 )
?
A. 4,977 yr old
B. 11,460 yr old
C. 10,487 yr old
D. 11,082 yr old
E. 10,931 yr old
Answer: B
Mathematics
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Express the number in scientific notation.2500
A. 2.5 × 10-2 B. 2.5 × 10-3 C. 2.5 × 103 D. 2.5 × 102
Mathematics
Provide an appropriate response.Is (2y + 1) a factor of (14y2 + 35y + 14)?
Fill in the blank(s) with the appropriate word(s).
Mathematics
Predict the display a calculator would give for the expression shown in the screen. .0000062
A. 62E6 B. 6.2E6 C. 62E-6 D. 6.2 E-6
Mathematics
Sketch the graph of the quadratic function. Identify the vertex and axis of symmetry.f(x) = (x + 1)2 - 9
A. vertex: (1, - 9)
axis of symmetry: x = 1
B. vertex: (- 1, - 9)
axis of symmetry: x = - 1
C. vertex: (- 1, - 9)
axis of symmetry: x = - 1
D. vertex: (1, - 9)
axis of symmetry: x = 1
Mathematics