Use a vertical format to subtract the polynomials. 0.08x3 - 0.01x2 + 0.03x
A. 0.3x3 + 0.08x2 + 0.02x
B. 0.03x3 - 0.1x2 - 0.97x
C. 0.3x3 - 0.1x2 + 0.04x
D. 0.03x3 + 0.08x2 + 1.03x
Answer: D
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Simplify.
? 
A. 
B. 
C. 
D. 
The position vector of a particle is r(t). Find the requested vector.The acceleration at t = 
for r(t) = (7 sin 2t)i - (2 cos 2t)j + (7 csc 2t)k
A. a
= -28i - 28k
B. a
= 28i + 28k
C. a
= 8j + 28k
D. a
= -28i + 28k
Find the work done by the force field F in moving a particle along the curve C.F = xyi + 7j + 4xk; C: x = cos 2t, y = sin 2t, z = t, 0 ? t ? 
A. 
B. 
C. 
D. 0
Solve the problem.Robin is having her yard landscaped. She obtained an estimate from two landscaping companies. Company A gave an estimate of $200 for materials and equipment rental plus $55 per hour for labor. Company B gave and estimate of $275 for materials and equipment rental plus $40 per hour for labor. Determine how many hours of labor will be required for the two companies to cost the same.
A. 4 hours B. 8 hours C. 9 hours D. 5 hours