The concentration of hydrogen ions in blood is 3.98 × 10-8. What is the pH of blood?
A. 8.0
B. 3.98
C. 6.6
D. 7.4
Answer: D
Mathematics
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Write the equation for the plane.The plane through the point P(3, 4, 4) and parallel to the plane 
A. 2x + 7y + 4z = -50 B. 3x + 4y + 4z = 50 C. 2x + 7y + 4z = 50 D. 7x + 4y + 2z = 50
Mathematics
Find the extreme values of the function subject to the given constraint.
A. Minimum: 5 at (±1, 0); maximum: 7 at (0, ±1) B. Minimum: 5 at (0, ±1); maximum: 7 at (±1, 0) C. Minimum: 5 at (0, ±1); maximum: 0 at (0, 0) D. Minimum: 5 at (±1, 0); maximum: 0 at (0, 0)
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Find the Taylor series for the given function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Simplify the rational expression.
A. 
B. 
C. 
D. 
Mathematics