Find the surface area of the figure. Use 3.14 as an approximation for ?. Round your result to the nearest tenth.A right circular cone with r = 5 cm, h = 10 cm (S = ?r 
+ ?r2)
A. 254.0 cm2
B. 78.5 cm2
C. 314.0 cm2
D. 157.0 cm2
Answer: A
Mathematics
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Solve the problem.A reflecting telescope contains a parabolic mirror. If the mirror is 18 inches across at its opening and is 2 feet deep, where will the light be concentrated?
A. 0.2 in. from the vertex B. 0.8 in. from the vertex C. 10.1 in. from the vertex D. 0.1 in. from the vertex
Mathematics
Solve the equation.6 = 
a
A. {14} B. {13} C. {48} D. {0}
Mathematics
If possible, solve each system by an algebraic method (substitution or addition method). Otherwise, state that the problem has no solution or an infinite number of solutions.
x + 
y = 0 x - y = 12
A. (5, -5) B. (-6, -5) C. (-6, 6) D. (6, -6)
Mathematics
Multiply. Write the answer in lowest terms.
? 
A. 
B. 
C. 
D. 
Mathematics