Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 6x, y = 6, x = 0
A. 3?
B. 18?
C. 12?
D. 24?
Answer: D
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Solve.The pitch P of a musical tone varies inversely as its wavelength W. One tone has a pitch of 479 vibrations per second and a wavelength of 8.8 ft. Find the wavelength of another tone that has a pitch of 492 vibrations per second.
A. 26,780.5 ft B. 0.000037 ft C. 0.12 ft D. 8.6 ft
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 250e-.223t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 3.11 yr B. 24.76 yr C. 55.75 yr D. 27.87 yr
Use a calculator to find the value to four decimal places.
?
Fill in the blank(s) with the appropriate word(s).
Solve the linear programming problem.Maximize and minimize z = 12x + 10y subject to: x ? 0,
y ? 0,
2x + 3y ? 6,
x ? 10,
y ? 5.
A. maximum: 50; minimum: 30 B. maximum: 170; minimum: 20 C. maximum: 170; minimum: 120 D. maximum: 120; minimum: 30