For certain decisions, the time it takes to respond is a function of the number of choices faced. The relationship is
,
where R is reaction time in seconds, and N is the number of choices.A: Express using functional notation the reaction time if there are 8 choices. Then calculate that value. Round your answer to one decimal place if necessary. B: Make a graph of R versus N. Include up to 10 choices.C: Is the graph concave up or concave down? Explain in practical terms what the concavity of the graph means.
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What will be an ideal response?
. The value is 0.5 seconds.??
B:
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C: The graph is concave down. Additional choices make more difference in reaction time when there are fewer choices available.
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A. 6 B. 1, 6 C. 1, 13 D. 6, 13
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Solve the equation. Express radicals in simplest form.-7k2 - 9 = -184
A. -92 B. ±5 C. 5 D. ±10
Multiply. Simplify and leave the numerator and denominator in your answer in factored form.
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A. 
B. 
C. 
D. 