Solve the problem.A rectangular enclosure must have an area of at least 2100 yd2. If 200 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. 30 ? w ? 50
B. 50 ? w ? 70
C. 0 ? w ? 30
D. 30 ? w ? 70
Answer: A
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Perform the operation and give the answer in Hindu-Arabic form. src="https://sciemce.com/media/4/ppg__ttt0612191108__f1q179g6.jpg" alt="" style="vertical-align: 0.0px;" height="10" width="5" />
- 
A. 38
B. 32
C. 22
D. 28
Solve the problem.A rotating beacon is located a distance d from a long wall. The distance d is given byd = 4 tan 2?t,where t is the time measured in seconds since the beacon started rotating. Solve the equation for t.
A. t = 
tan 
B. t = 2? arctan 
C. t = 
arctan 
D. t = 2? tan 
Find the LCD for the list of fractions. Write the list as equivalent fractions with the LCD as their denominators.
, 
, 
A. (k + 4)(k - 2)3(k - 6)(k - 9);
, 
, 
B. (k + 4)(k - 6)(k - 9);
, 
, 
C. (k + 4)(k - 2)(k - 6)(k - 9);
, 
, 
D. (k + 4)(k - 2)(k - 6);
, 
, 
Rationalize the denominator. Assume that all variables represent positive real numbers.- 
A. -3
B. - 
C. -40
D. - 