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. 297
B. 312
C. 302
D. 287
Answer: C
You might also like to view...
Solve the given equation for x.y = 7 cos-1 
A. x = 4 cos 7y
B. x = 4 sin 7y
C. x = 7 cos 
D. x = 4 cos 
Solve the problem.An airplane has an airspeed of 125 km/h. It is to make a flight in a direction of 305° while there is a 
wind from 210°. What will the airplane's actual direction be?
A. 318° B. 107° C. 283° D. 292°
Provide an appropriate response.A student was trying to solve the problem 
. The student knew that he or she should set 
but was confused about whether or not he or she should set 
, or 7 = 0 and 
. How would you advise this student?
What will be an ideal response?
Provide an appropriate response.In the given figure, the graphs of y = ax for a = 1.5, 2.3, 3.4, 0.6, 0.87, 0.42 are given. Identify the graph of y = 0.87x.
A. V B. VI C. II D. III