Determine the half-life of the substance that decays from A0 to A in time t. Round to the nearest tenth of a unit. A0 = 10.5, A = 8.5, t = 30 minutes
A. 6.9 min
B. 4.4 min
C. 98.4 min
D. 142.0 min
Answer: C
Mathematics
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Find all specified roots.Square roots of 4 + 4
i
A. 
+ 
i, - 
- 
i
B. - 
- 
i, 
- 
i
C. 
- 
i, - 
+ 
i
D. 
+ 
i, - 
- 
i
Mathematics
Solve the equation:
Mathematics
Write the equation of the line with the given slope and y-intercept.m = 
, b = 1
A. y = - 
x + 1
B. y = 
x + 1
C. y = - 
x - 1
D. y = 
x - 1
Mathematics
Write the rational number in the form of an infinite geometric series.
A. 0.03 + 0.0003 + 0.000003 + ... B. 0.03 + 0.003 + 0.0003 + 0.00003 + ... C. 0.3 + 0.03 + 0.003 + 0.0003 + ... D. 3.3 + 0.03 + 0.003 + 0.0003 + ...
Mathematics