A substance has a hydrogen ion concentration of  figure 1.png)
. Find the pH of the substance.
 figure 2.png)
(e) pH ? 2.4
Mathematics
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Use l'Hopital's Rule to evaluate the limit.
A. 1
B. 
C. 
D. 0
Mathematics
Find the series' radius of convergence.
A. 0 B. ?, for all x C. 1 D. 2
Mathematics
Write the fraction or mixed number as a percent. Write the percent using decimals.
A. 0.09% B. 9% C. 90% D. 0.9%
Mathematics
Write the number as a product of a real number and i. Simplify the radical expression.
A. 3i
B. -3
C. 3
D. -3i
Mathematics