Polar coordinates of a point are given. Find the rectangular coordinates of the point.
A. 
B. 
C. 
D. 
Answer: B
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Write the sum without sigma notation and evaluate it.
A. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= 3 + 
B. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= -2 + 
+ 
C. 2 cos ? + 2 cos 
+ 2 cos 
+ 2 cos 
= -1 + 
D. 2 cos ? + 2 cos 
= -2 + 
Solve by completing the square.x2 + 4x = 3
A. -1 ± 
B. -2 ± 2
C. -2 ± 
D. 2 + 
Write an equation that expresses the relationship. Use k as the constant of variation.The intensity I of light varies inversely as the square of the distance D from the source. If the intensity of illumination on a screen 72 ft from a light is 3.2 foot-candles, find the intensity on a screen 90 ft from the light.
A. 2.56 foot-candles B. 4 foot-candles C. 2.048 foot-candles D. 5 foot-candles
Solve the problem.A mutual fund is made up of growth stocks and bonds, and the manager has determined that for every 9 growth stocks it has in this fund that it must also have 4 bonds. In total, what is the smallest number of bonds and growth stocks combined that this fund could have?
A. 72 B. 13 C. 36 D. 360