Find the area enclosed by the given curves.y = - 4sin x, y = sin 2x, 0 ? x ? ?
A. 16
B. 
C. 4
D. 8
Answer: D
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The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = (6t2 + 2)i + (5t3 - 8t)k
A. ?
B. 0
C. 
D. 
Solve the problem.
Jackie Rambler purchased a home for $124,000. Oakwood Mortgage Company approved her loan application for a 22-year fixed-rate loan at 6.25%. Jackie agreed to pay 20% of the purchase price as a down payment. How much interest would she have saved if she made the same loan with the same down payment for 12 years?
A. $41,521.15 B. $51,901.44 C. $43,592.45 D. $37,592.83
Solve the system of equations by elimination.
A. (-3, 1) B. (1, -3) C. infinitely many solutions D. no solution
Use mathematical induction to prove that the statement is true for every positive integer n.5 + 2 ? 5 + 3 ? 5 + . . . + 5n = 
What will be an ideal response?