Complete the table for the radioactive isotope.
Isotope
Half-life(years)
Initial Quantity
Amount after 1000 years
1599
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A. Initial Quantity: 
B. Initial Quantity: 
C. Initial Quantity: 
D. Initial Quantity: 
E. Initial Quantity: 
Answer: C
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Provide an appropriate response.Explain the error in the following: x2 + 2x - 15 = (x - 5)(x + 3)
What will be an ideal response?
Solve the problem.In a school survey, students showed these preferences for instructional materials. 
About how many students would you expect to prefer written materials in a school of 1000 students?
A. About 90 students B. About 180 students C. About 9 students D. About 360 students
Write the equation of the line whose graph is shown.
A. y = 2x + 6
B. y = - 
x + 2
C. y = -2x + 6
D. y = - 3x + 6
Write the linear system corresponding to the reduced augmented matrix.
A. x1 = -4, x2 = t + 6, x3 = t for any real number t B. No Solution C. x1 = 4, x2 = -t + 6, x3 = t for any real number t D. x1 = 4, x2 = t + 6, x3 = 0