Solve.
= 3 + 
A. ?
B. -5, 8
C. -8, -5
D. 5, 8
Answer: D
Mathematics
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Determine whether the given number is approximate or exact.There are 5280 feet in a mile.
A. Exact B. Approximate
Mathematics
Multiply.9 ? 4
A. 32 B. 13 C. 40 D. 36
Mathematics
Solve.The radioactive decay of radium 226 can be described by the equation 
where C is the original amount of radium and A is the amount of radium remaining after t years. If 23 milligrams of radium are sealed in a container now, how much radium will be in the container after 100 years. Round to the nearest thousandth.
A. 22.99 mg B. 24.006 mg C. 1.194 mg D. 22.037 mg
Mathematics
Use a graphing utility to obtain the plane curve represented by the given parametric equations.Witch of Agnesi: x = 2 cot t, y= 2 sin2 t, 0 ? t < 2?
A. 
B. 
C. 
D. 
Mathematics