Write the number in scientific notation.In a certain city, the subway system carried a total of 1,970,000,000 passengers.
A. 1.97 × 108
B. 19.7 × 109
C. 1.97 × 1010
D. 1.97 × 109
Answer: D
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Find the length of the parametric curve defined over the given interval.x = 
(t3 - 3t), y = t2 + 3, 0 ? t ? 1
A. 
B. 
C. 
D. 2
Solve the problem.The table lists blood types in a sample of hospital patients. Make a bar graph for the relative frequency data.
What will be an ideal response?
This model is of the form f(x) = mx + b. Determine what m and b signify.The cost, in dollars, of a one-day car rental is given by 
where x is the number of miles driven.
A. $0.19 is the cost per day to rent the car and $28 is the cost per mile. B. $28 is the cost per day to rent the car and $0.19 is the cost per mile. C. $28 is the cost per day to rent the car and $19 is the extra cost for unlimited miles. D. $19 is the cost per day to rent the car and $0.28 is the cost per mile.
Answer the question.Graph the rectangle with vertices (4, 2), (7, 5), ( 9, -3), and (12, 0). Are the midpoints of the sides the vertices 
A. Yes B. No