Solve the problem.Use the formula N = Iekt, where N is the number of items in terms of the initial population I, at time t, and k is the growth constant equal to the percent of growth per unit of time. A certain radioactive isotope has a half-life of approximately 1500 years. How many years would be required for a given amount of this isotope to decay to 40% of that amount?
A. 900 years
B. 1105 years
C. 1943 years
D. 1983 years
Answer: D
Mathematics
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Find the slope and the y-intercept of the line.y - 4x + 3 = 0
A. slope: 4; y-intercept (0, -3)
B. slope: -3; y-intercept: 
C. slope: 4; y-intercept: (0, 3)
D. slope: 3; y-intercept: 
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Solve the equation and check your proposed solution.f + 16 = -8
A. -24 B. 8 C. -8 D. 24
Mathematics
Divide using long division.84 ÷ 6
A. 15 r 1 B. 24 C. 15 D. 14
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Find all solutions of the equation.sin x csc x = -2 sin x
A. x = 
+ n? or x = 
+ n? or x = n?
B. x = 
+ n? or x = 
+ n? or x = n?
C. x = 
+ 2n? or x = 
+ 2n? or x = n?
D. x = 
+ 2n? or x = 
+ 2n? or x = n?
Mathematics