Add or subtract. Assume all variables represent positive real numbers.
+ 
A. 5x + 4
B. 13x + 26
C. 
D. 5
Answer: D
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Find the root. Round to three decimal places if necessary.
A. 417.5 B. 6.073 C. 6.393 D. 40.866
Solve the problem.An electric circuit board has equally spaced parallel wires with connections at points A, B, and C, as shown in the figure. If 
what is the length of 
?
A. 1.89 cm B. 3.30 cm C. 4.13 cm D. 4.40 cm
Find the domain of the rational function.g(x) = 
A. All real numbers except 0 and 36 B. All real numbers except -6 and 6 C. All real numbers except -6, 6, and -4 D. All real numbers
Solve the problem.A sample of 400 g of lead-210 decays to polonium-210 according to the function given by 
where t is time in years. What is the amount of the sample after 60 years (to the nearest g)?
A. 43 g B. 59 g C. 2728 g D. 167 g