Solve the problem.A company sells children's toy binoculars. The following equations model the cost per month (in dollars) to make x pairs of binoculars and the revenue per month (in dollars) earned by selling x pairs of binoculars. Explain the meaning of the point (750, 2250). Cost: y = x + 1500 Revenue: y = 3x[where x is the number of pairs of binoculars sold per month and y is the amount (cost or revenue) per month in dollars]
A. Revenue will equal cost ($750) when the company makes 2250 pairs of binoculars.
B. Revenue will equal cost ($750) when the company makes and sells 2250 pairs of binoculars.
C. Revenue will equal cost ($2250) when the company makes 750 pairs of binoculars.
D. Revenue will equal cost ($2250) when the company makes and sells 750 pairs of binoculars.
Answer: D
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What will be an ideal response?
Solve.If a string with a fundamental frequency of 110 Hz is plucked in the middle, it will vibrate at the odd harmonics of 110, 330, 550,. . . Hz. A resulting pressure P caused by the string can be approximated with the equation 
. 
Graph P in the window 
A. 
B. 
C. 
D. 
Factor the binomial completely: 
a. 
b. 
c. 
d. Prime
A. 120 B. 0 C. 1 D. undefined E. None of these