Find the domain and range of the function.F(t) = t2 - 1
A. D: [-1,?), R: [-1,?)
B. D: (-?, ?), R: (-?, ?)
C. D: (-?, ?), R: [-1,?)
D. D: [0, ?), R: (-?, -1]
Answer: C
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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%
Determine whether the function is one-to-one.
A. Yes B. No
Supply the missing numbers. Round decimals to the nearest thousandth and percents to the nearest tenth of a percent.fractiondecimalpercent?0.4
A.
 ? | 4% |
B.
 ? | 40% |
C.
 ? | 40% |
D.
 ? | 4% |
The graph of a function f is given. Use the graph to answer the question.For what values of x is f(x) < 0?
A. (-?, -15) B. [-25, -15), (17.5, 25) C. (-15, 17.5) D. (-15, ?)