Find the torsion of the space curve.r(t) = (t - 3)i + (ln(sec t) + 8)j - 10k, -?/2 < t < ?/2
A. ? = 0
B. ? = -1
C. ? = 1
D. Undefined
Answer: A
Mathematics
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Perform the indicated operations.3 × 10-35 + 5 × 10-34
A. 8.0 × 10-34 B. 5.3 × 10-35 C. 5.3 × 10-34 D. 5.3 × 10-33
Mathematics
IT = 131 mA, I1 = 15 mA, and I2 = 36 mA. Find I3.
a. 152 mA
b. 80 mA
c. 183 mA
d. 110 mA
e. 65 mA
Mathematics
Use mathematical induction to prove that the statement is true for every positive integer n.1 ? 8 + 2 ? 8 + 3 ? 8 + . . . + 8n = 
What will be an ideal response?
Mathematics
Solve the problem.The hydrogen potential, pH, of a substance is defined by pH = -log [H+], where [H+] is measured in moles per liter. Find the pH of a sample of lake water whose [H+] is 3.05 × 10-9 moles per liter. (Round to the nearest tenth.)
A. 10.1 B. 7.3 C. 6.4 D. 8.5
Mathematics