Solve the problem.An angle above the horizontal is called an angle of elevation, and an angle below the horizontal is called an angle of depression. 
An airline passenger sees a lake at an angle of depression of 18°. If the plane is flying at an altitude of 28,000 feet, find the distance from the plane to the lake to the nearest mile.
A. 90,610 miles
B. 17 miles
C. 51 miles
D. 16 miles
Answer: B
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Solve the problem.Find the center of mass of a tetrahedron of density 
bounded by the coordinate planes and the plane 
.
A. 
= 
, 
= 
, 
= 
B. 
= 
, 
= 
, 
= 
C. 
= 
, 
= 
, 
= 
D. 
= 
, 
= 
, 
= 
Use the figure below to answer the question. m?COD= 80°, AB = 20°, PB= 6 ft, PA= 8 ft and AC = 5 ft.
 FIGURE.png)
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Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.(-4p3q3r3)6
A. (-4)6p18q18r18 B. -24p9q9r9 C. (-4)18p18q18r18 D. (-4)6p9q9r9
The table shows Jose's expenses for one month. Use the table to answer the question.How much less did Jose spend on rock climbing expenses (gear and lessons) than on rent? Monthly ExpensesRent$531Food$216Car repairs, gas$93.59Utilities$59.88Phone$80.26Rock climbing gear$167.59Rock climbing lessons$173Entertainment$67.00
A. 536.41 B. 363.41 C. 189.44 D. 190.41