In a right triangle, find the length of the side not given. Let c represent the length of the hypotenuse. Give an answer to the nearest tenth if necessary.b = 7 yd, c = 14 yd
A. a = 7 yd
B. a ? 12.1 yd
C. a ? 9.9 yd
D. a ? 4.6 yd
Answer: B
Mathematics
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The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds).s = 4 sin t - cos tFind the body's acceleration at time t = ?/4 sec.
A. - 
m/sec2
B. 
m/sec2
C. - 
m/sec2
D. 
m/sec2
Mathematics
Evaluate the integral.
A. 
x2e2x - 
xe2x + 
e2x + C
B. 
x2e2x - 
xe2x + C
C. 
x2e2x - 
xe2x + 
e2x + C
D. 
x2e2x - xe2x + 
e2x + C
Mathematics
Factor by grouping.18a3 + 24a2b - 15ab2 - 20b3
A. (6a2 - 5b2)(3a + 4b) B. (18a2 - 5b2)(a + 4b) C. (6a2 - 5b)(3a + 4b) D. (6a2 + 5b2)(3a - 4b)
Mathematics
Look at the circuit shown below and solve for F.
a. (A + B) ú (B + C)
b. (A ú B) + (B ú C)
c. (A + B) ú C
d. A ú (B + C)
e. B ú (A + C)
Mathematics