The "forgetting curve" for memorizing nonsense syllables is given by equation below, where R is the percentage who remember the syllables after t seconds.
?
, 
?
In how many seconds would only 10% 
of the students remember? Round your answer to the nearest second.
?
Solve for the exact value of t in terms of R.
What will be an ideal response?
13; 
Mathematics
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Find the derivative.g(x) = (6x5 - 8x)9/5
A. 
(6x5 - 8x)4/5
B. 
(6x5 - 8x)4/5(30x4 - 8)
C. 
(30x4 - 8)4/5
D. 
(6x5 - 8x)-4/5 (30x4 - 8)
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Multiply. Write the answer in descending order and combine like terms.(2y - 5)(4y2 + 5y - 3)
A. 8y3 + 10y2 - 31y + 15 B. 8y3 + 10y2 + 31y + 15 C. 8y3 - 10y2 + 31y + 15 D. 8y3 - 10y2 - 31y + 15
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Add as indicated.8n6 - 4n5 - 6
A. 14n11 B. 3n6 + 6n5 + 5 C. 17 - 6n6 + 3n5 D. 17n6 - 6n5 + 3
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Use the even-odd identities to find the exact value of the expression. sin 
A. - 
B. - 
C. 
D. 
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