Solve.The highest point at at oil drilling operation is the top of the 74-foot-high oil drilling rig. The lowest point the drill head has reached so far is -237 feet. How far above the drill head is the top of the oil drilling rig?
A. -237 ft
B. -311 ft
C. 311 ft
D. 163 ft
Answer: C
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Factor by any method.15x4 + 22x2 + 8
A. (3x2 + 1)(5x2 + 8) B. (3x2 + 2)(5x2 + 4) C. (5x2 - 4)(3x2 - 2) D. (15x2 + 2)(x2 + 4)
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 7 miles east of O and 12 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. 15.9 miles B. 8.1 miles C. 27 miles D. 26.2 miles
Fill in the blank with the correct symbol <, >, or =, to make a true statement.-6.9 
-1.0
A. < B. = C. >
Solve the equation. Express radicals in simplest form.b2 + 
b = - 
A. 
B. 
C. ?
D. 