Solve by the quadratic formula. Simplify answers. Use i notation for nonreal complex numbers.x2 + 7x + 5 = 0
A. x = 
B. x = 
C. x = 
D. x = 
Answer: D
Mathematics
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Find the volume of the described solid.The base of the solid is the disk x2 + y2 ? 4. The cross sections by planes perpendicular to the 
between 
and 
are isosceles right triangles with one leg in the disk.
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression.
4
A. 36
B. 1
C. 
D. 
Mathematics
Solve the problem.Suppose the amount of a radioactive element remaining in a sample of 100 milligrams after x years can be described by A(x) = 100e-0.01766x. How much is remaining after 35 years? Round the answer to the nearest hundredth of a milligram.
A. 185.54 milligrams B. 0.54 milligrams C. 53.90 milligrams D. 61.81 milligrams
Mathematics
Find the product. Use the FOIL method.(3 + x)(4x - 9)
A. 4x2 + 3x - 27 B. 4x2 + 2x - 27 C. 4x2 - 27x + 3 D. x2 + 3x + 3
Mathematics