Find the angle 
between the vectors. Round your answer to two decimal places.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Solve the problem.Two angles of a triangle are 10° and 30°. What is the measure of the third angle?
A. 140° B. 320° C. 50° D. 40°
Solve using a system of two equations in two unknowns.Dmitri needs 5 liters of a 7% solution of sulfuric acid for a research project in molecular biology. He has two unlimited supplies of sulfuric acid solution: 5% solution and 10% solution. How many liters of each solution should Dmitri use?
A. 5% solution: 3 L, 10% solution: 2 L B. 5% solution: 3.5 L, 10% solution: 1.5 L C. 5% solution: 2.5 L, 10% solution: 2.5 L D. 5% solution: 2 L, 10% solution: 3 L
A mortar shell is fired with a muzzle speed of 325 ft/sec. Find the angle of elevation of the mortar if the shell strikes a target located 1500 ft away. Round your answer to 2 decimal places.
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Find an equation for the ellipse described.Center at (2, 2); focus at (6, 2); vertex at (8, 2)
A. 
- 
= 1
B. 
+ 
= 2
C. 
+ 
= 1
D. 
+ 
= 1