Solve the problem.The population of a particular species of insect was 18,000 in 1960. In 1980, there were 3100 fewer, and this year, there are 1700 fewer. What is the current population?
A. 22,800 insects
B. 16,600 insects
C. 19,400 insects
D. 13,200 insects
Answer: D
Mathematics
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Solve the problem.The diagonal of a rectangular storage room is 9 yards long. If its length is 5 times its width, find the dimensions of the room.
A. 
yd by 
yd
B. 
yd by 
yd
C. 
yd by 
yd
D. 9
yd by 45
yd
Mathematics
Find the exact value of the expression.cos (-1050°)
A. 
B. 
C. - 
D. - 
Mathematics
Write the standard form of the equation of the circle with radius r and center (h, k).r = 
; (h, k) = (0, 5)
A. (x + 5)2 + y2 = 100 B. x2 + (y - 5)2 = 10 C. x2 + (y + 5)2 = 10 D. (x - 5)2 + y2 = 100
Mathematics
Find all complex solutions for the equation.36x-2 - 21x-1 = 30
A. 
B. 
C. 
D. 
Mathematics