5.1 ð 104 - 3.92 ð 104 =
a. 3.41 ð 104
b. 1.18 ð 105
c. 1.18 ð 104
d. -3.41 ð 105
e. -3.41 ð 104
c. 1.18 ð 104
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It is the rotation of a space station that provides Earth-level gravity. The number N of rotations per minute needed to provide Earth-level gravity depends on the radius r, in meters, of the spinning space station. The relationship is
?
.
A. Make a graph of the number of rotations per minute versus the radius. Include radii from 10 to 100 meters.B. What happens to the required number of rotations as the radius increases?C. What number of rotations per minute is required if the radius is 26.00 meters? Report your answer correct to 2 decimal places.
What will be an ideal response?
Find the vector x determined by the given coordinate vector [x]B and the given basis B.B = 
, [x]B = 
A. 
B. 
C. 
D. 
Solve the problem.An express train and a local train leave Gray Lake at 3 P.M. and head for Big City 50 miles away. The express travels twice as fast as the local and arrives 1 hour ahead of the local. Find the speed of each train.
A. Express train's speed = 60 mph and local train's speed = 30 mph. B. Express train's speed = 25 mph and local train's speed = 12.5 mph. C. Express train's speed = 50 mph and local train's speed = 25 mph. D. Cannot be determined with information given.
Solve the problem. Round your answer, if appropriate.The volume of a rectangular box with a square base remains constant at 700 cm3 as the area of the base increases at a rate of 6 
2/sec. Find the rate at which the height of the box is decreasing when each side of the base is 11 cm long. (Do not round your answer.)
A. 
cm/sec
B. 
cm/sec
C. 
cm/sec
D. 
cm/sec