Residential customers who heat their homes with natural gas have their monthly bills calculated by adding a base service charge of $5.48 per month and an energy charge of 48.59 cents per hundred cubic feet. Write an equation for the monthly charge y (in dollars) in terms of x, the number of hundreds of cubic feet used.
?
A. 
B. 
C. 
D. 
E. 
Answer: B
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Identify the equation as either an identity or not.1 + sec2x sin2x = sec2x
A. Not an identity B. Identity
Use cylindrical coordinates to find the volume of the indicated region.the region enclosed by the paraboloids 
and 
A. 16? B. 64? C. 48? D. 32?
The algebraic expression has been translated to a word phrase that is ambiguous (unclear). Indicate why the translation is unclear and give a translation that is not ambiguous. 9x + 4 Translation: nine times x plus four
A. Mistake: could be translated as 9(x + 4) Correct: nine times the sum of x and four B. Mistake: could be translated as 9(x + 4) Correct: nine times x increased by four C. Mistake: could be translated as 9(x + 4) Correct: four more than nine times x D. Mistake: could be translated as 9 + 4x Correct: nine times the sum of x and four
Write the number using digits.ten million, three hundred fifty-four thousand, two hundred three
A. 10,354,203 B. 135,423 C. 1,354,203 D. 1,354,230