Differentiate.y = 
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Find the sum of the series as a function of x.
A. - 
B. - 
C. 
D. 
Mathematics
Find the vector projv u.v = 3i - j + 3k, u = 2i + 10j + 11k
A. 
i - 
j + 
k
B. 
i + 
j + 
k
C. 
i - 
j + 
k
D. 
i + 
j + 
k
Mathematics
Solve the problem.If x is the hydrogen ion concentration of a sample of water, then the pH of that water sample is 
If the pH of the water from one lake is 4.9 and the pH of the water from a second lake is 6.8, how many times greater is the hydrogen ion concentration of the second lake than the hydrogen ion concentration of the first lake? Round your answer to the nearest hundredth.
A. 5.26 B. 24.42 C. 0.01 D. 79.43
Mathematics
Find the product and write the result in standard form.(-3 + i)(-3 - i)
A. -8 B. 9 C. -3 D. 10
Mathematics