Find the exact value of the expression. Do not use a calculator.tan 150° cos 210°
A. - 
B. 
C. 
D. 
Answer: A
Mathematics
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Determine whether or not the triangles are similar.
A. Not similar B. Similar
Mathematics
Graph the nonlinear inequality with restrictions.y2 - x2 < 25, y < 0
A. 
B. 
C. 
D. 
Mathematics
Express the sum using summation notation.
+ 
+ 
... + 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem. Use 3.14 as an approximation for ? where appropriate.Calculate the surface area of an unopened steel can that has a height of 4 cm and a radius of 9 cm.
A. 1,017.4 cm2 B. 367.4 cm2 C. 734.8 cm2 D. 621.7 cm2
Mathematics