Solve the problem.A certain radioactive isotope has a half-life of approximately 1600 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 80% of that amount?

A. 515 years
B. 435 years
C. 320 years
D. 3715 years


Answer: A

Mathematics

You might also like to view...

Find the coordinates of the centroid of the given figure. Each region is covered by a thin, flat plate.The region bounded by the parabola x = y2 and the line x = 9

A. (9, 0)
B.  
C.
D.

Mathematics

Find the equation of the tangent line to the curve when x has the given value.f(x) = x2 + 11x - 15 ; x = 1

A. y = 13x - 16  
B. y = -  +  
C. y = -39x - 80  
D. y =   + 

Mathematics

Insert <, >, or = between the pair of numbers to form a true statement.0.5 _____ 0.084

A. < B. > C. =

Mathematics

Divide.-  ÷ 

A. - 
B. 2
C.
D. -2

Mathematics