Decide whether the problem is an equation or an expression.9x + 4 = 
A. Expression
B. Equation
Answer: B
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Interpret the meaning of the slope and the y-intercept of the equation in terms of the conditions stated in the problem.The cost, in dollars, of cellular phone service with Econo-phone is given by 
where x is the number of minutes used in one month.
A. 17.25 signifies the total phone bill, and 0.51 signifies the number of minutes used. B. 17.25 signifies the cost per minute, and 0.51 signifies the monthly service charge. C. 0.51 signifies the hourly phone rent, and 17.25 signifies the cost of the hardware. D. 0.51 signifies the cost per minute, and 17.25 signifies the monthly service charge.
Solve the problem.Suppose that f is continuous and that 
and 
Find 
.
A. -12 B. -6 C. 6 D. 12
Find the first four nonzero terms of the Maclaurin expansion of the given function.f(x) = ex sin x
A. 1 + x2 + 
x3 + 
x5 + ...
B. 1 + x + 
x2 - 
x6 - ...
C. 1 + 
x + 
x3 - 
x5 - ...
D. x + x2 + 
x3 - 
x5 - ...
Find the domain and range of the inverse of the given function.f(x) = x4 + 9, x ? 0
A. Domain and range: all real numbers B. Domain: [9, ?); range: [0, ?) C. Domain: (-?, 0]; range: (-?, 9] D. Domain: [0, ?); range: [9, ?)