Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find [H3O+] if the pH = 1.4.
A. 4.0 × 10-1
B. 2.5 × 10-2
C. 4.0 × 10-2
D. 2.5 × 10-1
Answer: C
Mathematics
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Find the area.
A. 12.4 ft2 B. 9.52 ft2 C. 6.2 ft2 D. 4.76 ft2
Mathematics
Solve the inequality and graph the solution.
? 6
A. n > 18
B. n ? 18
C. n < 18
D. n ? 18
Mathematics
Find the unit vector having the same direction as v.v = -7j
A. u = -j
B. u = - 
j
C. u = -7j
D. u = 49j
Mathematics
Find the x- and y-intercepts. If no x-intercepts exist, state so.f(x) = x2 - 2
A. (±
, 0), (0,2)
B. (0, ±
), (0,-2)
C. (0, ±
), (0,2)
D. (±
, 0), (0,-2)
Mathematics