Solve the problem. Round your answer, if appropriate.As the zoom lens in a camera moves in and out, the size of the rectangular image changes. Assume that the current image is 
Find the rate at which the area of the image is changing (dA/df) if the length of the image is changing at 0.7 cm/s and the width of the image is changing at 0.4 cm/s.
A. 14.0 cm2/sec
B. 14.6 cm2/sec
C. 7.3 cm2/sec
D. 7.0 cm2/sec
Answer: D
Mathematics
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Rewrite using a positive exponent. Evaluate, if possible.x-3
A. 
B. 3x
C. 
D. x3
Mathematics
Solve the problem.The expected future population of a small town, which currently has 7400 residents, can be approximated by the formula y = 7400(1.7)-0.2twhere t is the number of years in the future. Find the expected population of the town 50 years in the future.
A. 2516 B. 37 C. 7400 D. 0
Mathematics
Determine if the complex number belongs to the Mandelbrot set.z = 0.4 - 0.7i
A. Yes B. No
Mathematics
Solve the equation. First simplify the expression by combining like terms.
x + 
= 
- 
x + 
A. 
B. 
C. 
D. 
Mathematics