Solve the problem.The volume of water added to a circular drum of radius r is given by 
, where 
is volume in cu ft and t is time in sec. Find the depth of water in a drum of radius 9 ft after adding water for 21 sec. (Round result to one decimal place.)
A. 0.4 ft
B. 0.6 ft
C. 0.8 ft
D. 1.3 ft
Answer: A
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Use the figure below to answer the following question(s).
Which graph has 3 components?
A. Graph 1 B. Graph 3 C. Graph 4 D. Graph 2 E. none of these
Identify the number as prime, composite, or neither.36
A. Composite B. Neither C. Prime
Find all real solutions to the system of equations using the substitution method.y = 6x2 - 5xy = 2x + 3
A. (
, 
), (1, 5)
B. (- 
, 2), (1, 5)
C. (
, 
), (- 
, 0)
D. ( 
, 6), (- 
, 
)
Solve the problem.S(x) = -x3 + 6x2 + 288x + 4000, 4 ? x ? 20 is an approximation to the number of salmon swimming upstream to spawn, where x represents the water temperature in degrees Celsius. Find the temperature that produces the maximum number of salmon. Round to the nearest tenth, if necessary.
A. 8°C B. 12°C C. 20°C D. 4°C