Determine whether or not the function is one-to-one.f(x) = - 
A. Yes
B. No
Answer: A
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Solve the problem.A team of engineers is testing an experimental high-voltage fuel cell with a potential application as an emergency back-up power supply in cell phone transmission towers. Unfortunately, the voltage of the prototype cell drops with time according to the equation 
where V is in volts and t is the time of operation in hours. The cell provides useful power as long as the voltage remains above
What will be an ideal response?
Find the circumference of the circle with the given radius or diameter.d = 7.94 cm
A. 49.89 cm B. 49.9 cm C. 24.94 cm D. 24.9 cm
Find the surface area of the solid.Find the surface area of a right square pyramid with a side 10 inches and a slant height of 10 inches.
A. 300 in.2 B. 200 in.2 C. 125 in.2 D. 225 in.2
Graph the pair of polar equations on a calculator, together on the same screen, and use the trace feature to estimate the polar coordinates of all points of intersection of the curves. Round to the nearest hundredth, if necessary.r = 9, r = 9 + sin ?
A. (0, 0), (9, 0), (9, 3.14) B. (0, 0), (0, 9), (3.14, 9) C. (9, 0), (9, 3.14) D. (0, 9), (3.14, 9)