x4 - 40x2 + 144 = 0
A. {2, 6}
B. {-2i, 2i, -6i, 6i}
C. {4, 36}
D. {-2, 2, -6, 6}
Answer: D
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Evaluate the function for the indicated input and interpret the result.The table lists the number of persons voting in an election by election year and sex, for a small community. 
Let this table be a partial numerical representation of a function f, where 
computes the number of persons who voted in the year x whose sex is y. Evaluate 
Interpret the result.
A. f (1968, Female) = 888 The number of females who voted in 888 was 1968. B. f (1968, Female) = 699 The number of females who voted in 1968 was 699. C. f (1968, Female) = 15 The number of females who voted in 1968 was 15. D. f (1968, Female) = 657 The number of females who voted in 1968 was 657.
Use grouping to factor the polynomial.z4 - 5z3 - 7z2 + 35z
A. z(z2 - 7)(z - 5) B. z(z2 - 5)(z - 7) C. (z3 - 7)(z + 5) D. z(z2 + 7)(z - 5)
Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by 
where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 
A. 102 B. 10-2 C. 0.5 D. 0.69