Find the derivative of y with respect to the appropriate variable.y = (6 - 6?) tanh-1 ?
A. 
B. 
- 6 tanh-1 ?
C. 
- 6 tanh-1 ?
D. 
- 6 tanh-1 ?
Answer: C
Mathematics
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Solve the problem. Round to the nearest tenth of a percent unless otherwise noted. The graph below shows how the average value of a boat, which costs 
new, changes as it ages. Find the percent decrease in value as the boat ages from 4 years old to 5 years old. Round to the nearest percent.
A. 0.1300% B. 0.1200% C. 13% D. 12%
Mathematics
Solve.
x2 = 6
A. No solution
B. 294, -294
C. 7
, - 7
D. 
, - 
Mathematics
Use the laws of exponents to simplify each expression using positive exponents only. Assume all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 
Mathematics
Find the function value.Find f(4) when f(x) = 9 - 8x2.
A. 137 B. -119 C. -23 D. -55
Mathematics