Find the exact or approximate circumference of the circle, as indicated.Find the approximate circumference. Use 
for ?.
A. 154 in.
B. 308 in.
C. 30,184 in.
D. 616 in.
Answer: D
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Solve.In a sample of 85 fluorescent bulbs, 4 were found to be defective. At this rate, how many defective bulbs should be found in 425 bulbs?
A. 18 B. 19 C. 21 D. 20
Use an integer or rational number to express the number representing change.On a sunny day, the water temperature in the swimming pool rises 4 degrees.
A. 4 B. -4
Test the equation for symmetry with respect to the given axis, line, or pole.r = -4 cos ?; the line ? = 
A. Symmetric with respect to the line ? = 
B. May or may not be symmetric with respect to the line ? = 
Solve.A certain element is so light that 1 cubic foot (ft3) of it weighs only 0.07743 pound. Round this weight to the nearest hundredth of a pound.
A. 0.00 lb B. 0.07 lb C. 1.00 lb D. 0.08 lb