Solve the problem.The gravitational force (in lb) of attraction between two objects is given by 
where x is the distance between the objects. If the objects are 10 ft apart, find the work required to separate them until they are 50 ft apart. Express the result in terms of k.
A. 
k
B. 
k
C. 
k
D. 
k
Answer: B
Mathematics
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Graph the integrand and use geometry to evaluate the integral.
A. 147
B. 98
C. 49
D. 
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Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
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Find the values of x for which the function is continuous.
?
?
A. 
B. 
C. 
D. 
Mathematics
Determine if the graph represents a function that has an inverse function.
A. does not have an inverse B. has an inverse
Mathematics