The radioactive element polonium decays according to the law 
, where Q?0 is the initial amount and the time t is measured in days. If the amount of polonium left after 280 days is 80 mg, what was the initial amount present?
?
__________ mg
Fill in the blank(s) with the appropriate word(s).
320
You might also like to view...
Give the appropriate form of the partial fraction decomposition.
A. 
+ 
+ 
B. 
+ 
C. 
+ 
D. 
+ 
+ 
Multiply.(827)(93)
A. 76,911 B. 76,901 C. 77,011 D. 76,921
Simplify the exponential expression.(-6x7)(-4x9)
A. -24x16 B. -24x63 C. 24x63 D. 24x16
Obtain an equivalent system by performing the stated elementary operation on the system.Multiply the third equation by 1/4.3x - y + 4z + w = -104x - z - 2w = 34x - 8y + 3z - w = -20 x + 3y - 8z = 1
A. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z + 
w = -20
x + 3y - 8z = 1
B. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z - 
w = -5
x + 3y - 8z = 1
C. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 8y + 3z - w = -20
x + 3y - 8z = 1
D. 3x - y + 4z + w = -10
4x - z - 2w = 3
x - 2y + 
z - 
w = -20
x + 3y - 8z = 1