Solve the problem.In the formula A(t) = A0ekt, A(t) is the amount of radioactive material remaining from an initial amount A0 at a given time t and k is a negative constant determined by the nature of the material. A certain radioactive isotope has a half-life of approximately 1050 years. How many years would be required for a given amount of this isotope to decay to 25% of that amount?

A. 436 yr
B. 2075 yr
C. 2100 yr
D. 787.5 yr


Answer: C

Mathematics

You might also like to view...

Decide whether the statement is true or false. If the statement is false, give an example to show that it is false.A circuit cannot be both a Hamilton circuit and an Euler circuit.

What will be an ideal response?

Mathematics

Find the function with the given derivative whose graph passes through the point P.f'(x) = x2 + 4, P(3, 44)

A. f(x) =  + 4x
B. f(x) = x3 + 4x + 5
C. f(x) =  + 4x + 23
D. f(x) = x3 + 4x2 + 23

Mathematics

Find the slope and the y-intercept.5x + y = 4

A. = 5; (0, 4)
B. = -5; (0, 4)
C. = 
D. = - 

Mathematics

Solve the problem.The following table shows the number of resistors, in thousands, produced by Allied Electronics in 3 recent years.   Fit a quadratic function f(x) = ax2 + bx + c to the data. What is the value of b?

A. 12 B. 10 C. 11 D. 9

Mathematics