Solve the problem.A certain radioactive isotope has a half-life of approximately 1750 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 70% of that amount?
A. 525 years
B. 831 years
C. 901 years
D. 3040 years
Answer: C
Mathematics
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Solve the problem.Of the 800 suburban residents polled about gardening, 
replied that they plant a garden. How many plant a garden?
A. 40 residents B. 800 residents C. 760 residents D. 95 residents
Mathematics
Write an equivalent expression by factoring out the greatest common factor.9wx - 9wy - 12wz
A. 3(3wx - 3wy - 4wz) B. 9w(x - 9y - 12z) C. 3w(3x - 3y - 4z) D. 3w(3x - 9wy - 12wz)
Mathematics
Solve for VL and IL using Norton's Theorem.
E = 14 V
R1 = 4.7 Kê
R2 = 2.2 Kê
RL = 1.5 Kê
Mathematics
Find the values of x that satisfy the given condition for the function.Solve R(x) ? 0 if R(x) = 
A. (-?, -7) B. (-?, -7) ? [3, ?) C. [3, ?) D. (-7, 3]
Mathematics