A certain radioactive substance has a half-life of 75 hours. Find how long it will take, to the nearest hour, for 75% of the radioactivity to be dissipated if the amount of material x satisfies 
(t in hours). Round your answer to the nearest hour.
?
A. 182 hours
B. 171 hours
C. 157 hours
D. 150 hours
E. 31 hours
Answer: D
Mathematics
You might also like to view...
Use Simpson's rule to approximate the value of the integral defined by the given set of points.
A. 0.61 B. 0.67 C. 0.42 D. 0.52
Mathematics
Divide, if possible. Assume any variable in the denominator is nonzero.
A. x B. Undefined C. 0 D. 1
Mathematics
Simplify.(5x3)3
A. 15x6 B. 125x9 C. 15x9 D. 5x9
Mathematics
Graph the basic function using a solid line and the transformed function using a dotted line.g(x) = -2?x?
A. 
B. 
C. 
D. 
Mathematics