Solve the problem.The hydrogen potential, pH, of a substance is defined by pH = -log [H+], where [H+] is measured in moles per liter. Find the pH of a sample of lake water whose [H+] is 3.05 × 10-9 moles per liter. (Round to the nearest tenth.)
A. 8.5
B. 10.1
C. 7.3
D. 6.4
Answer: A
Mathematics
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Find all real solutions of the polynomial equation 
a. 
b. 
c. 
d. 
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Write as a decimal.- 
A. -0.9
B. -1.1
C. -0.
D. -0.8
Mathematics
Write a chain rule formula for the following derivative.
for w = f(x, y, z); x = g(s, t), y = h(s, t), z = k(s)
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
Mathematics
True or false: the following subset of 
is a subspace of .
?
The set of all positive functions: 
?
Answer the following statement true (T) or false (F)
Mathematics