Solve the problem.A rectangular enclosure must have an area of at least 7200 yd2. If 340 yd of fencing is to be used, and the width cannot exceed the length, within what limits must the width of the enclosure lie?
A. 0 ? w ? 80
B. 80 ? w ? 90
C. 80 ? w ? 85
D. 85 ? w ? 90
Answer: C
Mathematics
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Solve the problem.Stevie bought a stereo for $205 and put it on sale at his store at a 70% markup rate. What was the retail price of the stereo?
A. $410.00 B. $305.00 C. $248.50 D. $348.50
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Find the derivative of the function.y = (x + 1)2(x2 + 1)-3
A. 
B. 
C. 
D. 
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Estimate the slope of the tangent line to the curve at the given point.
A. 3
B. 
C. 
D. 
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Write in radical form. Assume all variables represent positive real numbers.m8/3
A. 
3
B. 
C. 
D. 
8
Mathematics