Calculate the arc length of the indicated portion of the curve r(t).r(t) = 3ti + 
j + 
k; -1? t ? 7
A. 40
B. 200
C. 150
D. 30
Answer: A
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Determine the most appropriate metric unit to go in the blank. Choose from km, m, cm, mm, L, mL, kg, g, and mg.Each day I drive 8 
to work.
A. kg
B. cm
C. m
D. km
E.
| L |
Add and simplify. Write the answer as a mixed number as needed.5
+ 7
A. 12
B. 13
C. 12
D. 13
Provide an appropriate response.The three-part inequality a < x ? b means "a is less than x and x is less than or equal to b". Which of these inequalities is not satisfied by any real number x?
A. 0 < x ? 4 B. -2 < x ? 6 C. -5 < x ? -11 D. -8 < x ? -7
Solve the problem.The following data show the list price, x, in thousands of dollars, and the dealer invoice price, y, also in thousands of dollars, for a variety of sport utility vehicles. Find a linear equation that approximates the data, using the points (16.5, 16.1) and (20.0, 18.3). 
A. y = 1.59x - 9.11 B. y = 0.629x + 6.38 C. y = 0.629x + 5.73 D. y = 1.59x - 10.2