Write as a decimal.0.02%
A. 2
B. 0.00002
C. 0.0002
D. 0.002
Answer: C
Mathematics
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Find the difference.
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A. - 
B. 
C. - 
D. 
Mathematics
An aqueous solution has a hydrogen concentration [H+] of 2.85 × 10-1. Find the concentration of hydroxl ions [OH-] in the solution.
A. 3.51 × 10-14 mol/L OH- B. 3.51 × 1014 mol/L OH- C. 3.51 × 10-13 mol/L OH- D. 2.85 × 10-14 mol/L OH-
Mathematics
Subtract. Combine like terms, and write the answer in descending order.(7z + 5z2 + 6) - (10z2 - 1)
A. -5z2 + 8z + 6 B. 15z2 + 7z + 5 C. -5z2 + 7z + 7 D. 15z2 + 8z + 6
Mathematics
Find the exact value of the expression. Do not use a calculator.cot 60° - cos 45°
A. 
B. 
C. 
D. 
Mathematics