Solve the problem.The number of years since two independently evolving languages split off from a common ancestral language is approximated by 
where r is the percent of words from the ancestral language common to both languages now. Find r if two languages split about 
ago. Round to the nearest percent.
A. 18%
B. 7%
C. 177%
D. 70%
Answer: D
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Solve the problem.If v = 2i - 4j - 5k and w = 5i + 6k, then evaluate v × w.
A. -24i + 13j - 20k B. 20i + 24j + 37k C. 20i + 40j - 8k D. -24i - 37j + 20k
Determine which of the following methods is the best choice for solving the given equation: factoring, using the principle of square roots or using the quadratic formula. Then, solve the equation.x2 - 10x + 34 = 0
A. Factoring; -5, 3 B. Quadratic formula; 5 ± 3i C. Square root principle; 10 ± 6i D. Square root principle or factoring; 8, 2
The graph of a quadratic function is given. Find the standard form of the function
A. f(x) = -2(x - 1)2 - 2
B. f(x) = - 
(x - 1)2 - 2
C. f(x) = -(x - 1)2 - 2
D. f(x) = - 
(x + 1)2 - 2
Translate the problem to an equation. Do not solve.The product of twice a number and 11 is 132.
A. 22x = 132x B. 2x + 11 = 132 C. 22x = 132