Solve.The hydrogen ion concentration of a substance is about 5.4 × 10-2 moles per liter. Find the pH. Round to the nearest tenth. Use the formula pH = -log [H+].
A. 1.3
B. 1.6
C. -2.7
D. 2.7
Answer: A
Mathematics
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Graph the equation. Include the coordinates of any local extreme points and inflection points.y = 
A. local minimum: (0, 0)
no inflection points
B. local minimum: 
no inflection points
C. local minimum: (0, 0)
inflection points: 
, 
D. local minimum: 
no inflection points
Mathematics
Perform the indicated operations. Write the resulting polynomial in standard form.(4x - 12)(4x + 12)
A. 4x2 + 96x - 144 B. 16x2 + 96x - 144 C. 16x2 - 144 D. 16x2 - 96x - 144
Mathematics
Provide an appropriate response. Divide: -36 ÷ 0.4
A. -90 B. 90 C. -900 D. -9
Mathematics
Perform the indicated operations and express your answer in the form a + bi. 
A. 13 B. -13 C. 13i D. -13i
Mathematics