Solve the problem.pH = -log10[H+] Find the pH if the [H+] = 8.1 × 10-13.
A. 13.09
B. 12.09
C. 13.91
D. 12.91
Answer: B
Mathematics
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Replace the polar equation with an equivalent Cartesian equation. r = 20 sin ?
A. y = 20 B. x2 + (y - 10)2 = 100 C. x2 + (y - 20)2 = 100 D. (x - 10)2 + y2 = 100
Mathematics
Add.
A. 70,436 B. 70,336 C. 70,446 D. 77,492
Mathematics
A point on the terminal side of angle ? is given. Find the exact value of the indicated trigonometric function.(5, 12)Find sin ?.
Fill in the blank(s) with the appropriate word(s).
Mathematics
Using the variable x, write the interval as an inequality.[-5, 9)
A. x < 9 B. -5 ? x < 9 C. -5 ? x ? 9 D. -5 < x ? 9
Mathematics