Give the measure of the missing angle using the similar triangles below.?E
?ABC ~ ?DEF, 
= 25 cm, ?B = 113°
A. 10°
B. 57°
C. 25 cm
D. 113°
Answer: D
Mathematics
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Evaluate the line integral along the curve C.
ds , C is the curve r(t) = 3ti + (9 cos 
t)j + (9 sin 
t)k , 0 ? t ? 
?
A. 
+ 
B. 
?2 + 
C. 
?
D. 
?2 + 81
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Solve the problems.Don sells real estate and receives a commission of $870. If his commission rate is 5% of the seller's net, what was the seller's net?
A. $20,880 B. $8,700 C. $87,000 D. $17,400
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Simplify. Write your answer with positive exponents only.
A. 
B. 
C. 
D. 
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Find the exact value by using a half-angle identity.sin 
A. 
B. 
C. 
D. 
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