Find the exact value of the expression.
A. 
B. 2
C. 
D. 
Answer: A
Mathematics
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Match the system of inequalities with one of the graphs.x2 + y2 < 9 y ? 1
A. 
B. 
C. 
D. 
Mathematics
Choose the graph of the equation.z = -x4 + y4 + 2x2 - 2y2 + 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.The resistance, in ohms, of a 25-foot piece of wire is given by the function 
, where d is the diameter of the wire in inches. What is the resistance, rounded to the nearest hundredth of an ohm, if the wire has a diameter of 
A. 1.86 ohms B. 1.40 ohms C. 7.41 ohms D. 1.74 ohms
Mathematics
Solve the problem.A certain radioactive isotope decays at a rate of 0.25% annually. Determine the half-life of this isotope, to the nearest year.
A. 3 yr B. 120 yr C. 277 yr D. 200 yr
Mathematics