Perform the operations.8.06 × 104
A. 8,060
B. 80,600
C. 806,000
D. 322.4
Answer: B
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Find the Jacobian 
or 
(as appropriate) using the given equations.
A. 
B. 100
C. -80
D. - 
Solve the problem. Write all linear equations in slope-intercept form.A driver wants to gauge the fuel efficiency of her vehicle at speeds of 30 mph and above. She notices that traveling at an average speed of 45 mph results in a rating of 39 mpg, whereas at an average speed of 50 mph, her car rates 29 mpg. Find a linear equation to model the gas mileage y for an average speed of x mph. Find the slope-intercept form of the equation of the line.
A. y = - 2x + 129
B. y = 
x + 51
C. y = - 2x + 51
D. y = 
x + 129
Factor the polynomial as the difference of two squares or state that it is irreducible.x4 - 625
A. irreducible B. (x2 - 25)(x + 5)(x - 5) C. (x + 5)2(x - 5)2 D. (x2 + 25)(x + 5)(x - 5)
The rational function f(x) = 
models the cost, f(x), in dollars, to produce x bobble-head figures. The graph is show. Use the equation to solve the problem. 
Find and interpret f(40).
A. 5; It costs $5 to produce 40 bobble-head figures. B. 405; It costs $405 to produce 40 bobble-head figures. C. 15; It costs $15 to produce 40 bobble-head figures. D. 600; It costs $600 to produce 40 bobble-head figures.