The graph of a function is given. Decide whether it is even, odd, or neither.
A. even
B. odd
C. neither
Answer: B
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Find T, N, and B for the given space curve.r(t) = (cosh t)i + (sinh t)j + tk
A. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k; 
B. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k; 
C. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k ; 
D. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k; 
Solve the problems.In a certain coastal basin, the sea water contains 3.2 grams of salt per 1000 milliliters of water. How many grams of salt would be in 4 liters of the sea water?
A. 1,280 g B. 128 g C. 12.8 g D. 0.128 g
Multiply. Write the answer in simplest form.
? 
A. 
B. 
C. 
D. 
Solve the problem.If y varies directly as x and inversely as the square root of w, and y = 63 when 
and 
find y when 
and 
A. y = 18
B. y = 18
C. y = 54
D. y = 36