Solve the problem.The half-life of a radioactive element is 130 days, but your sample will not be useful to you after 80% of the radioactive nuclei originally present have disintegrated. About how many days can you use the sample?
A. 302
B. 297
C. 287
D. 312
Answer: A
Mathematics
You might also like to view...
Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = 7|x|
A. 
B. 
C. 
D. 
Mathematics
Convert as indicated.6.29 kg to grams
A. 0.00629 g B. 6290 g C. 629 g D. 0.0629 g
Mathematics
Replace the ? with < or >.0.37700 ? 0.377
A. = B. < C. >
Mathematics
Solve the triangle. Round side lengths and angle measures to the nearest tenth when necessary. 
A. A ? 106°, B ? 55.7°, C ? 18.3° B. A ? 112°, B ? 52.6°, C ? 15.4° C. A ? 138°, B ? 32.6°, C ? 9.4° D. A ? 120.4°, B ? 47.1°, C ? 12.5°
Mathematics