Solve the problem.The pH of a chemical solution is given by the formula pH = -log10[H+] where [H+] is the concentration of hydrogen ions in moles per liter. Find the pH if the [H+] = 6.7 x 10-1.
A. 0.17
B. 1.17
C. 0.83
D. 1.83
Answer: A
Mathematics
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Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Mathematics
Perform the indicated operations. Write answers using only positive exponents. Assume variables represent positive real numbers.(9z)1/5 ? (9z)-2/5
A. 
B. (81z)1/5
C. 
D. (9z)1/5
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.tan ? = 
, ? < ? < 
Find tan(2?).
A. 
B. 
C. - 
D. - 
Mathematics
Solve.Estimate the perimeter of the figure by rounding each measurement to the nearest whole inch.
A. 31 in. B. 29 in. C. 33 in. D. 30 in.
Mathematics