Solve the problem.The following nine tasks (with completion times given in hours) are all independent: 
D(3), E(6), F(4), G(1), H(2), and I(4). Using the critical-path algorithm to schedule this project with four processors results in a finishing time of
A. 9 hours.
B. 8 hours.
C. 10 hours.
D. 12 hours.
E. none of these
Answer: A
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Find the volume of the solid generated by revolving the region R bounded by the graphs of the given equations about the y-axis.x = y1/3, x = 0, y = 8
A. 32?
B. 
?
C. 12?
D. 16?
Express the radical in simplest form, rationalize denominators, and perform the indicated operations.21
- 7
A. 14
B. 28
C. 70
D. 14
Solve the problem.A searchlight is shaped like a paraboloid of revolution. If the light source is located 5 feet from the base along the axis of symmetry and the opening is 14 feet across, how deep should the searchlight be?
A. 0.9 ft B. 12.3 ft C. 2.5 ft D. 9.8 ft
Use the following information to solve the problem. An airport is located at point O. A short-range radar tower is located at point R. The maximum range at which the radar can detect a plane is 4 miles from point R.Assume that R is 4 miles east of O and 10 miles north of O. In other words, R is located at the point 
. An airplane is flying parallel to and 6 miles east of the north axis. (In other words, the plane is flying along the path 
.) What is the shortest distance north of the airport at which the plane can still be detected by the radar tower at R? Round your
answer to the nearest tenth of a mile. A. 23.5 miles B. 22.8 miles C. 6.5 miles D. 13.5 miles