Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 112 ft/sec and the gorge is 160 ft deep, during what interval can the flare be seen? 
A. 2 sec < t < 5 sec
B. 6 sec < t < 9 sec
C. 4 sec < t < 7 sec
D. 0 sec < t < 2 sec
Answer: A
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Perform the following operation:
(4.7 ð 103 ð 5.6 ð 102) ÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ (4.7 ð 103 + 5.6 ð 102) a. 1 ð 100 b. 5.00 ð 102 c. 2.03 ð 104 d. 3.91 ð 103 e. 7.61 ð 102
In a bandpass filter, the lower cut-off frequency, fr, is best described by:
a. CN ÄÄÄÄ 2ãC2 b. ÚÄÄÄÄÄÄÄ ûf1 ú f2 c. 1 ÄÄÄÄÄÄÄ 2ãRTHC1
Find the indicated intercept(s) of the graph of the function.x-intercepts of f(x) = 
A. (3, 0) B. (6, 0) C. (-6, 0) D. none
Identify the degree of the polynomial and list its coefficients.3x2 - 7x + 9
A. degree: 2 coefficients: 3, -7, 9 B. degree: 2 coefficients: 3, 7, 9 C. degree: 3 coefficients: 3, -7, 9 D. degree: 3 coefficients: -7, 9