Solve.A certain radioactive isotope has a half-life of approximately 1450 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 40% of that amount?
A. 1877 years
B. 1069 years
C. 870 years
D. 1917 years
Answer: D
Mathematics
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A. 
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Factor completely, if possible.-24x3 - 42x2 + 45x
A. -3x(2x + 5)(4x - 3) B. x(2x + 5)(-12x + 9) C. -3(2x2 + 5)(4x - 3) D. x(-6x - 15)(4x - 3)
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Find the exact value of the indicated trigonometric function of ?.sec ? = 
, ? in quadrant IVFind tan ?.
A. - 
B. - 
C. - 
D. - 
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Solve the equation. If the equation has no real solution, so state.
- 
= 1
A. x = 3 B. No solution C. x = 3, x = -1 D. x = -3, x = -1
Mathematics