Solve the problem.A particular substance decays in such a way that it loses half its weight each day. How much of the substance is left after 7 days if it starts out at 16 grams?
A. 4 g
B. 8 g
C. 
g
D. 
g
Answer: D
Mathematics
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Round following numbers as indicated.53.123494 (ten-thousandth)
A. 53.123494 B. 53.12349 C. 53.1235 D. 53.1236
Mathematics
Find the sum of the infinite geometric series.
+ 
+ 
+ 
+ ...
A. Does not exist
B. S = 25
C. S = 
D. S = 5
Mathematics
Perform the indicated operations. [(1.9x3 + 7.3x2 + 4.5) + (6.3x - 2.2)] - (3.1x2 -x - 9.2)
A. 1.9x3 + 4.2x2 + 6.3x + 11.5 B. 1.9x3 + 4.2x2 + 7.3x + 11.5 C. 1.9x3 + 10.4x2 + 5.3x - 6.9 D. 13.4x6 + 11.5
Mathematics
Find the equation of the tangent line at the given value of x on the curve.2xy - 2x + y = -14, x = 2
A. y = - 
x + 
B. y = - 
x + 
C. y = 
x - 
D. y = 
x - 
Mathematics