Simplify the complex number to its rectangular form.
+ 
A. 7 + 8j
B. 15j
C. 8 + 7j
D. 7 - 8j
Answer: A
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Evaluate the integral.
A. 
B. 
C. 
D. 58
Find the extreme values of the function subject to the given constraint.
A. Maximum: 1 at 
minimum: -1 at 
B. Maximum: 9 at 
minimum: -9 at 
C. Maximum: 1 at 
minimum: -1 at 
D. Maximum: 8 at 
minimum: -8 at 
Express each quantity as a positive or negative number.225 feet above sea level
A. +225 feet B. -225 feet
Solve the problem.The intensity of light from a light source varies inversely as the square of the distance from the source. Suppose the the intensity is 40 foot-candles at a distance of 10 feet. What will the intensity be at a distance of 22 feet? Round your answer to the tenths place.
A. 8.5 foot-candles B. 7.7 foot-candles C. 8.3 foot-candles D. 8.0 foot-candles