Solve the problem.Chuck and Dana agree to meet in Chicago for the weekend. Chuck travels 285 miles in the same time that Dana travels 265 miles. If Chuck's rate of travel is 4 mph more than Dana's, and they travel the same length of time, at what speed does Chuck travel?
A. 57 mph
B. 53 mph
C. 51 mph
D. 63 mph
Answer: A
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Solve the problem.If the switch is thrown open after the current in an RL circuit has built up to its steady-state value, the decaying current obeys the equation 
How long after the switch is thrown open will it take the current to fall to 
of its original value?
A. 1.05 L/R seconds B. 1.25 L/R seconds C. -4.40 L/R seconds D. -4.60 L/R seconds
Use the improved Euler's method to calculate the first three approximations to the given initial value problem. Compare the approximations with the values of the exact solution.y' = x + y, y(1) = 1, h = 0.2
A. 
B. 
C. 
D. 
Provide an appropriate response.Look at the relation graphed below. Is this relation a function? Why?
A. Yes; any horizontal line passes through no more than one point on the graph. B. No; a horizontal line passes through two points on the graph. C. No; a vertical line passes through two points on the graph. D. Yes; any vertical line passes through no more than one point on the graph.
Simplify the exponential expression using the rules for exponents.(x-4)-3
A. x12
B. 
C. 
D. -x7