Use factoring techniques to solve the quadratic equation.x2 + 8x + 7 = 0
A. {1, - 7}
B. {1, 7}
C. {7, 0}
D. {- 1, - 7}
Answer: D
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Evaluate the integral.
A. 9? B. 16? C. 17? D. 8?
Use Gauss's Divergence Theorem to calculate 
.F(x, y, z) = cos z2i + exj + 7zk, S is the cube -1 ? x ? 1, -1 ? y ? 1, -1 ? z ? 1.
A. 28 B. 7 C. 56 D. 14
Solve the problem.A certain radioactive isotope decays at a rate of 2% per 100 years. If t represents time in years and y represents the amount of the isotope left then the equation for the situation is 
In how many years will there be 90% of the isotope left?
A. 527 yr B. 246 yr C. 1000 yr D. 500 yr
Solve the problem.Assume that G is a graph with 10 vertices. It is known that one vertex has degree 9 and the other vertices each have degree 1. What can be said about G?
A. G is not a tree. B. It is impossible to tell if G is a tree or not. C. G is a tree. D. G has no bridges. E. none of these