Evaluate the numerical value of the formula with the given replacement values.C = 
A = 128, B = 8
A. 8
B. 64
C. 512
D. 32
Answer: A
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Solve the problem.The amount of alcohol in the bloodstream, A, declines at a rate proportional to the amount, that is, 
. If 
for a particular person, how long will it take for his alcohol concentration to decrease from 0.10% to 0.05%? Give your answer to the nearest tenth of an hour.
A. 0.2 hr B. 3.5 hr C. 4.6 hr D. 2.3 hr
Solve the problem. Unless stated otherwise, assume that the projectile flight is ideal, that the launch angle is measured from the horizontal, and that the projectile is launched from the origin over a horizontal surfaceA spring gun at ground level fires a tennis ball at an angle of 54°. The ball lands 25 m away. What was the ball's initial speed? Round your answer to the nearest tenth.
A. 5.1 m/sec B. 17.4 m/sec C. 257.6 m/sec D. 16.1 m/sec
Determine the domain and range of the function.
A. Domain: {2, 4, 6, 8}; range: {45, 30, 20, 10} B. Domain: {2, 4, 6, 8, 10}; range: {45, 30, 20, 10, 5} C. Domain: {45, 30, 20, 10, 5}; range: {2, 4, 6, 8, 10} D. Domain: {4, 4, 6, 8, 10}; range: {45, 30, 20, 10, 5}
Solve the problem.Two recording devices are set 3600 feet apart, with the device at point A to the west of the device at point B. At a point on a line between the devices, 200 feet from point B, a small amount of explosive is detonated. The recording devices record the time the sound reaches each one. How far directly north of site B should a second explosion be done so that the measured time difference recorded by the devices is the same as that for the first detonation?
A. 1241.22 ft B. 1788.85 ft C. 425 ft D. 7375.64 ft