If r(t) is the position vector of a particle in the plane at time t, find the indicated vector.
Find the velocity vector of the particle.
A. v(t) = (-8)i + 
j
B. v(t) = 
i + (-8t)j
C. v(t) = (-8t)i - 
j
D. v(t) = (-8t)i + 
j
Answer: D
Mathematics
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The given triangles are similar. Find the unknown length n. Be sure to include units in the answer.
A. 0.4225 yd B. 10 yd C. 4 yd D. 1 yd
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Solve the problem.An object has a frequency of 5 vibrations per second. Write an equation in the form d = sin ?t for the object's simple harmonic motion.
A. d = sin 10t
B. d = sin 
?t
C. d = sin 10?t
D. d = sin 
t
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Solve for base in the problem. Round to the nearest hundredth, if necessary.87 gallons is 114% of gallons.
A. 129.96 B. 12,996 C. 763.2 D. 76.32
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Find the period of the function. y = 5 cos 
x
A. 
B. 
C. 4?
D. 5
Mathematics