Solve the problem.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. By using linear regression, the following function is obtained: 
where x is the number of hours spent in the lab and y is grade on the test. Use this function to predict the grade of a student who spends 19 hours in the lab. Number of hours spent in lab Grade (percent) 10 96 11 51 16 62 9 58 7 89 15 81 16 46 10 51
A. 69.6
B. 57.1
C. 53.3
D. 49.3
Answer: C
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List the elements in the set .Let U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z} C = {v, w, x, y, z}. (A ? B')' ? C'
A. {q, r, s, t, u, z} B. {v, w, x, y} C. {q, r, s, t, u} D. ?
Rationalize the denominator.
A. 12
B. 
C. 37
D. 
Determine which, if any, of the three statements are equivalent.I) Gasoline costs $1.99 per gallon if and only if you live in Cook County.II) You do not live in Cook County and gasoline does not cost $1.99 per gallon.III) If you do not live in Cook County then gasoline does not cost $1.99 per gallon and if gasoline does not cost $1.99 per gallon then you do not live in Cook County.
A. I and II are equivalent B. I and III are equivalent C. II and III are equivalent D. None are equivalent
The circle or ellipse shown in the calculator-generated graph was created using function mode with a square viewing window. What are the two functions y1 and y2 that were used to obtain the graph whose equation is given?(x - 1)2 + (y - 1)2 = 1
A. 
, 
B. 
, 
C. 
, 
D. 
, 