Solve the problem.A cellular phone plan had the following schedule of charges:Basic service, including 100 minutes of calls$20.00 per month2nd 100 minutes of calls$0.075 per minuteAdditional minutes of calls$0.10 per minuteWhat is the charge for 200 minutes of calls in one month?What is the charge for 250 minutes of calls in one month?Construct a function that relates the monthly charge C for x minutes of calls.
What will be an ideal response?
$27.50
$32.50;
C(x) = 
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Identify where f is increasing and where f is decreasing.f(x) = 
A. increasing: (-?, 7]; decreasing: [7, ?) B. increasing: [-7, ?); decreasing: (-?, -7] C. increasing: [7, ?); decreasing: (-?, 7] D. increasing: (-?, -7]; decreasing: [-7, ?)
Solve the problem.If 2x = 4,what does 2-2x equal?
A. -16
B. 
C. 16
D. 
Graph the function f by starting with the graph of y = x2 and using transformations (shifting, compressing, stretching, and/or reflection).f(x) = -x2 + 6x - 7 
A. 
B. 
C. 
D. 
Solve the problem.The marriage rate in a certain country in 1990 was 0.96%, and there were about 420,000 marriages that year. Use the model M(t) = M0(1 + r)t, with a constant marriage rate and t = 0 corresponding to 1990 to estimate the number of marriages in 1999.
A. 457,713 B. 290,864 C. 0.00290864 D. 958,394