A water source is contaminated with a toxic chemical and is being cleaned. The amount of chemical, in grams, remaining t hours after the cleaning process began is given by
?
.
?
How much of the chemical is removed from time 
to time 
?
?
A. 361.43 grams
B. 4.17 grams
C. 24.34 grams
D. 19.99 grams
Answer: D
Mathematics
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Find the first four terms of the binomial series for the given function.
-2
A. 1 - 
x + 
x2 - 
x3
B. 1 - 
x + 
x2 - 
x3
C. 1 - 
x + 
x2 - 
x3
D. 1 - 
x + 
x2 - 
x3
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Solve using the addition and multiplication principles together.15(5c - 2) = 4c - 5
A. 
B. 
C. - 
D. 
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Simplify the right-hand side of the equation.f(x) = 
A. - 
B. - 
C. 
D. 
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Solve the system of equations using Cramer's rule.4x - 15y = 1-16x + 3y = -23
A. 
B. 
C. 
D. 
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