Determine whether each curve represents a graph of a function.
 figure 1.png)
(a) no
(b) no
(c) yes
(d) no
Mathematics
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Use a calculator to choose the equation whose graph is shown.
A. r = 3 sin ?
B. r = 
C. r = 
D. r = 
Mathematics
The quantity demanded per month of an item is related to the unit price by the demand equation 
where p is measured in dollars and x is measured in units of a thousand. How many items must be sold by the manufacturer to maximize its revenue?
Hint: Recall that the revenue is given by R = px.
Mathematics
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 
D. 
Mathematics
Answer the question about the given function.Given the function f(x) = 4x2 + 8x - 4, list the y-intercept, if there is one, of the graph of f.
A. -4 B. 4 C. 8 D. -8
Mathematics