Suppose that a certain radioactive substance has a half-life of 45 years. If there are presently 1,920 milligrams of the substance, how much, to the nearest milligram, will remain after 180 years?
A. Q = 130 milligram
B. Q = 120 milligram
C. Q = 135 milligram
D. Q = 95 milligram
E. Q = 125 milligram
Answer: B
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Perform the indicated calculation. Express your answer using scientific notation.(1.1 × 10-5)(1.5 × 10-8)
A. 1.65 × 10-13 B. 2.6 × 1013 C. 1.65 × 1013 D. 1.65 × 10-3
Provide an appropriate response.The shape of the main cable on a suspension bridge can be described by the function 
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What will be an ideal response?
Predict the number of tick marks on the positive x - axis and the positive y-axis.[-66, 66, 6] by [-96, 78, 6]
A. 29; 22 B. 22; 29 C. 11; 13 D. 13; 11