Graph the inequality.x2 + y2 > 16
A. 
B. 
C. 
D. 
Answer: D
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Solve the equation.x2 - 81 = 80x
A. {-1, 81} B. {-9} C. {-9, 9} D. {-81, 1}
Rewrite the fraction with the indicated denominator.
= 
A. 
B. 
C. 
D. 
Solve the problem.Tickets to a ballet cost $15 if bought in advance. If bought at the door, they cost $24. For the ballet to make a profit, the total money collected from ticket sales must be at least $390. (a) Write an inequality to represent this situation, using x for the number of tickets bought in advance and y for the number of tickets bought at the door. (b) Graph the inequality. Because x and y must be whole numbers, restrict the graph to Quadrant I. (c) Can the ballet make a profit if it sells 30 tickets in advance and 10 tickets at the door?
A. (a) 15x - 24y ? 390
(b)
(c) yes
B. (a) 15x + 24y ? 390
(b)
(c) yes
C. (a) 15x + 24y ? 390
(b)
(c) no
D. (a) 15x - 24y ? 390
(b)
(c) no
Find the surface area of the geometric solid. If needed, use 3.14 as an approximation for ? and round the answer to the nearest tenth.Sphere: r = 5 mi
A. 104.7 mi2 B. 314 mi2 C. 523.3 mi2 D. 78.5 mi2