Translate the given formula to English.f-stop = 
, where f-stop is camera setting with a lens with focal length f and diaphragm opening D
What will be an ideal response?
A camera's f-stop varies directly as the lens focal length and inversely as the diaphragm opening.
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Find the volume of the described solid.The base of a solid is the region between the curve y = 6cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are isosceles right triangles with one leg on the base of the solid.
A. 
?
B. 3?
C. 
?
D. 9?
Solve the equation.
= 0
A. {0, 5} B. {0} C. {-5, 5} D. {-5, 0}
Solve the problem. Round your answer to the nearest whole number.Radioactive waste is entering the atmosphere over an area at a decreasing rate. Use the improper integral 
with P = 21 to find the total amount of waste that will enter the atmosphere for k = 0.07.
A. 3000 B. 300 C. 147 D. 30
Multiply.(4x + 5y)(4x - 5y)
A. 16x2 - 40xy - 25y2 B. 16x2 + 25y2 C. 16x2 + 40xy - 25y2 D. 16x2 - 25y2