Simplify.
+ 
A. 
B. 
C. 
D. 7
Answer: C
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The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 3 for r(t) = (5t - 2t4)i + (8 - t)j + (3t2 - 6t)k
A. a(3) = -216i - j + 6k B. a(3) = -54i + 6k C. a(3) = -216i + 6k D. a(3) = 216i + 6k
Solve the problem.Junior high classes of 30 students each met in the cafeteria to take achievement tests. If exactly 6 students sat at each table and 30 tables were used, how many classes took the tests?
A. 6 classes B. 9 classes C. 8 classes D. 19 classes
Write the ratio as a fraction in lowest terms. Be sure to make all necessary conversions.9
days to 2
weeks
A. 
B. 
C. 
D. 
If A denotes the area of the sector of a circle of radius r formed by the central angle ?, find the missing quantity. If necessary, round the answer to two decimal places.r = 17 inches, ? = 
radians, A = ?
A. 302.49 in2 B. 17.79 in2 C. 151.24 in2 D. 8.9 in2