Solve the problem.pH = -log10[H+] Find the [H+] if the pH = 7.4.
A. 2.51 × 10-7
B. 2.51 × 10-8
C. 3.98 × 10-8
D. 3.98 × 10-7
Answer: C
Mathematics
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sec2 x - tan2 y + z
A. 11 B. 4 C. 10 D. 5
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Solve the problem.If a coin is tossed four times, how many different heads-tails sequences are possible?
A. 32 B. 8 C. 16 D. 64
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Write the number in decimal form.
A. 
B. 
C. 
D. 
E. 
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Using a graphing calculator, find the values of x for which f'(x) = 0, to three decimal places.f(x) = 
A. 0, -2.891, 2.891 B. -2.828, 2.828 C. 0 D. There are no real values of x for which f'(x) = 0.
Mathematics