The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 9 + 3 cos tFind the body's acceleration at time t = ?/3 sec.
A. - 
m/sec2
B. 
m/sec2
C. - 
m/sec2
D. 
m/sec2
Answer: C
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Find IT in the parallel circuit below if R = 890 ê, C = 0.002 æF, f = 9 KHz, and E = 20 V.
a. 31.5 mA
b. 22.8 mA
c. 14.6 mA
d. 6.9 mA
e. 2.3 mA
Find the distance d(A, B) between the points A and B.A(-5, -2); B(5, 3)
A. 5
B. 75
C. 5
D. 75
Evaluate the expression without the use of a calculator, and then verify your answer using a calculator.ln l
A. 1 B. -1 C. 0 D. e
Find the center, foci, and vertices of the ellipse.36x2 + y2 - 288x + 540 = 0
A. (x - 6)2 + 
= 1
center: (6, 0); foci: (6, 
), (6, -
); vertices:(6, 4), (6, -4)
B. (x - 4)2 + 
= 1
center: (4, 0); foci: (4, 
), (4, -
); vertices:(4, 6), (4, -6)
C. 
+ (y - 4)2 = 1
center: (4, 0); foci: (4, 
), (4, -
); vertices:(4, 6), (4, -6)
D. 
+ (y - 6)2 = 1
center: (6, 0); foci: (6, 
), (6, -
); vertices:(6, 4),
(6, -4)