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 1365 years ago.
A. 136.5%
B. 7.6%
C. 76%
D. 13.65%
Answer: C
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Use polar coordinates to find the limit of the function as (x, y) approaches (0, 0).f(x, y) = 
A. 1 B. 0 C. 2 D. No limit
Solve the problem.The sum of a student's three scores is 239. If the first is 10 points more than the second, and the sum of the first two is 14 more than twice the third, what was the first score?
A. 75 B. 77 C. 87 D. 65
Solve the problem. Round your answer to the nearest tenth, if necessary.Working together, Rick and Juanita can complete a job in 6 hr. It would take Rick 9 hr longer than Juanita to do the job alone. How long would it take Juanita alone?
A. 3 hr B. 6 hr C. 9 hr D. 15 hr
Provide an appropriate response.Suppose a company establishes a sinking fund to replace equipment that has a salvage value of $50,000. The company deposits $20,000 into the fund at the end of every six months. If interest is earned at the rate of 8% compounded semiannually, the value of the fund at the end of six years is
A. $237,701.48. B. $300,516.11. C. $187,701.48. D. $137,701.48. E. $250,516.10.