Solve the problem. Find the magnitude of the torque in foot-pounds at point P for the following lever:
= 4 in. and 
= 5 lb
A. 
ft-lb
B. - 
ft-lb
C. 
ft-lb
D. 
ft-lb
Answer: C
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Evaluate the integral.
d?
A. 
+ C
B. ln (1 + e5?) + C
C. 5 ln (1 + e5?) + C
D. 
+ C
Solve the problem.A fisherman is about to reel in a 20-lb fish located 14 ft directly below him. If the fishing line weighs 1 oz per foot, how much work will it take to reel in the fish? Round your answer to the nearest tenth, if necessary.
A. 292.3 ft ? lb B. 378 ft ? lb C. 286.1 ft ? lb D. 294 ft ? lb
Use the properties of logarithms to evaluate the expression.6log6 (2x)
A. 1 B. 6 C. 62x D. 2x
Find the equilibrium values for B and F .
Chemicals enter a house’s basement air. Let F (t ) and B(t ) be the amount of chemical (in mg m3 ) in the first floor air and the basement air after t minutes, respectively. Let’s suppose that the rate of change of F and B are given by the equations: B'= -0.017B + 0.85 and F' = 0.015B - 0.0125F