Solve the problem.The shape and density of a thin shell are indicated below. Find the coordinates of the center of mass.Shell: portion of the sphere x2 + y2 + z2 = 25 that lies in the first octantDensity: constant
A. 
B. 
C. 
D. 
Answer: B
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Solve the system algebraically.y = 5x - 27y = 2x - 15
A. (4, -7) B. no solution C. (-4, 7) D. (-4, -7)
Solve. If necessary, round to the nearest tenth.A flagpole casts a shadow of 38 feet. Nearby, a 6-foot tree casts a shadow of 4 feet. What is the height of the flagpole?
A. 912 ft B. 25.3 ft C. 0.6 ft D. 57 ft
The concentration of a drug in an organ at any time t (in seconds) is given by 
where 
is measured in grams/cubic centimeter
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?
Please round the answer to two decimal places.
?
How long would it take for the concentration of the drug in the organ to reach 0.17
?
?
t = __________ sec
?
How long would it take for the concentration of the drug in the organ to reach 0.15?
?
t = __________ sec
What will be an ideal response?
Solve.The power that a resistor must dissipate is jointly proportional to the square of the current flowing through the resistor and the resistance of the resistor. If a resistor needs to dissipate 
of power when 
of current is flowing through the resistor whose resistance is 
find the power that a resistor needs to dissipate when 
of current are
flowing through a resistor whose resistance is 
A. 28 watts
B. 98 watts
C. 14 watts
D. 56 watts