Solve the problem.Two forces, of 52.0 and 51.7 lb, forming an angle of 165.6°, act at a point in the plane. Find the magnitude of the resultant force.
A. 13.0 lb
B. 103.7 lb
C. 2603.9 lb
D. 102.9 lb
Answer: A
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Provide an appropriate response.True or False? Exponential growth cannot continue indefinitely. After only a relatively large number of doublings, exponentially growing quantities reach possible proportions.
A. False B. True
Solve the problem.The power dissipated in an electric circuit is given by the expression 
where R is the resistance of the circuit and I is the current through the circuit. For a sinusoidal alternating current, the current might be represented by the relation 
where A is the amplitude, f is the frequency, and t is time. Write an expression for P involving the sine function, and use a fundamental identity to write P in terms of the cosine function.
A. P = RA sin2(2?ft) ; P = RA - RA cos2(2?ft) B. P = RA2 sin2(2?ft) ; P = RA2 - RA2 cos2(2?ft) C. P = RA2 sin2(2?ft) ; P = - RA2 cos2(2?ft) D. P = RA sin2(2?ft) ; P = RA - cos2(2?ft)
Add.+ 
A. 780.337 B. 780.347 C. 780.247 D. 780.346
First, use front end rounding to estimate each answer. Then find the exact answer.
+ 
What will be an ideal response?