Solve the problem.The table shows the number of new cases of a certain disease among women in six consecutive years. Data are in thousands rounded to the nearest hundred.YearNew Cases (thousands)20053.020063.420074.620085.420096.0201016.1Let x = 1 correspond to 2005 and let y be the number of new cases (in thousands) among women in year x. Find a quadratic function to model the data. Round to three decimal places if necessary.
A. y = 0.623x2 - 5.645x + 8.69
B. y = 6.69x2 - 3.645x + 0.823
C. y = 0.823x2 - 3.645x + 6.69
D. y = 0.945x2 - 5.212x + 8.921
Answer: C
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Solve the problem.At time 
a particle is located at the point (1, 1, 1). It travels in a straight line to the point 
has speed 2 at (1, 1, 1) and constant acceleration 
Find an equation for the position vector r(t) of the particle at time t.
A. r(t) = 
i - 
j - 
k
B. r(t) = 
i - 
j - 
k
C. r(t) = 
i - 
j - 
k
D. r(t) = 
i - 
j - 
k
Find the equation of the line specified.The line passes through the points (2, 1) and (3, 2)
A. y = x + 3 B. y = x - 1 C. y = x + 1 D. y = -x - 1
Divide.
A. 
+ 
i
B. 
+ 
i
C. 
- 
i
D. 
+ 
i
Solve the problem.Peter must practice the piano 14
hours per week. He has already practiced 7
hours. How many more hours does he need to practice?
A. 5
hours
B. 6 hours
C. 6
hours
D. 7
hours