A solution is an acid if its pH is less than 7 and a base if its pH is greater than 7. The pH is defined by 
where [H+] is the concentration of hydrogen ions in the solution. Use this information to answer the question.A mixture has a pH of 8.6. Find the concentration of hydrogen ions [H+] in the mixture. Is the mixture an acid or a base?
A. 108.6, acid
B. 108.6, base
C. 10-8.6, base
D. 10-8.6, acid
Answer: C
Mathematics
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Compute the compound interest.How long will it take for $9400 to grow to $24,000 at an interest rate of 10.1% if the interest is compounded quarterly? Round the number of years to the nearest hundredth.
A. 37.59 yr B. 25.6 yr C. 9.74 yr D. 9.4 yr
Mathematics
Find an equation of the line that has the given slope and contains the given point.m = 2, (-8, 4)
A. y - 4 = mx + 8 B. y - 4 = x + 8 C. y = 2x + 20 D. y = 2x - 20
Mathematics
Complete.9.45 m = 
cm
A. 94.5 B. 945 C. 0.0945 D. 0.945
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Write the percent as a fraction in simplest form.45
%
A. 
B. 
C. 
D. 
Mathematics