Solve the problem.Find the sum of the interior angles of an octagon.
A. 1440°
B. 900°
C. 180°
D. 1080°
Answer: D
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Provide an appropriate response.What two angles of elevation will enable a projectile to reach a target 
downrange on the same level as the gun if the projectile's initial speed is 
Assume there is no wind resistance.
A. 0.02° and 89.98° B. 22.56° and 67.44° C. 22.56° D. 45.12° and 44.88°
Solve the problem.To measure the width of a river, a surveyor starts at point A on one bank and walks 74 feet down the river to point B. He then measures the angle ABC to be 
Estimate the width of the river to the nearest foot. See the figure below. 
A. 32 ft B. 154 ft C. 67 ft D. 35 ft
Use a sum-to-product identity to rewrite the expression.cos 70° + cos 63°
A. 2(cos (66.5°) cos (3.5°)) B. 2(sin (66.5°) cos (3.5°)) C. 2(sin (3.5°) cos (66.5°)) D. 2(sin (66.5°) sin (3.5°))
Find the square root.- 
A. Not a real number B. -17 C. 17 D. -144