Add or subtract as indicated. Make sure that your answer is reasonable by estimating first.85.265 + 31.11 + 578.539 + 397.741
A. 571.9699
B. 734.6881
C. 1372.645
D. 1092.655
Answer: D
You might also like to view...
Solve the equation f(x) = 0 analytically and then use the graph of y = f(x) to solve the inequalities f(x) < 0 and 
f(x) = ln(x + 8) - ln(x - 8)
A. ?; (8, ?); ? B. ?; ?; (8, ?) C. ?; (-?, 8); ? D. ?; ?; (-?, 8)
Express as a sum of logarithms.log4 (41 ? 191)
A. log4 7831 + log4 7831 B. log4 4 + log41 41 + log191 191 C. log4 41 + log4 191 D. log41 4 + log191 4
Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
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?