A patient's skull is x-rayed from a distance (FFD) of 18cm and an exposure time of 0.3s. If a second x-ray is ordered at a distance of 30cm, what should the exposure time be assuming the current setting is not changed?
A. 0.83s
B. 0.5s
C. 0.11s
D. 0.18s
Answer: A
Mathematics
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A. (-6, 0) B. (0, 6) C. (0, -6) D. (6, 0)
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Find a general term an for the geometric sequence.a1 = 3, r = 3
A. an = 3n-1 + 2 B. an =3(3)(n-1) C. an= 3 + 6(n - 1) D. an = 3(3)n-1
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Solve the problem.The power P (in W) generated by a particular windmill is given by 
where V is the velocity of the wind (in mph). Estimate the instantaneous rate of change of power with respect to velocity when the velocity is 
(Round to one decimal.)
A. 5.5 W/mph B. 2.5 W/mph C. 0.3 W/mph D. 12.2 W/mph
Mathematics