Graph the circle.x2 + y2 + 8x + 2y + 1 = 0
A. 
B. 
C. 
D. 
Answer: C
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Solve.A photographer has enough liquid toner for twenty-five 8-in. by 10-in. prints. How many 5-in. by 5-in. prints will this amount cover? (Hint: The toner covers the area of the prints: Area = length × width.)
A. 75 B. 100 C. 110 D. 80
Solve the initial value problem.
= x cos (5x2), y(0) = 9
A. y = 
sin(5x2) + 9
B. y = sin (5x2) + 9
C. y = 
sin (u)
D. y = 
sin(5x2) + 9
For the given function, find the indicated function value, if it exists. If the value does not exist, answer "Does not exist".For f(x) = 
, find f(13).
A. 
B. 2
C. 
D. 
Write the best-fit linear model for the data.A study was conducted to compare the average time spent in the lab each week versus course grade for computer students. The results are recorded in the table below. Find a linear function that approximates a student's course grade as a function of the number of hours spent in lab. Number of hours spent in lab Grade (percent) 
A. y = 88.6 - 1.86x B. y = 1.86 + 88.6x C. y = 0.930 + 44.3x D. y = 44.3 + 0.930x