Solve the problem.You have 84 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the river, find the length and width of the plot that will maximize the area.
A. length: 21 feet, width: 21 feet
B. length: 42 feet, width: 42 feet
C. length: 63 feet, width: 21 feet
D. length: 42 feet, width: 21 feet
Answer: D
Mathematics
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Solve the problem.Find an equation for the level surface of the function f(x, y, z) = 
d? - 
dt that passes through the point (0, ln 3, ln 4) .
A. ey + ez - 
= -1
B. ey - ez + 
= 1
C. ey + ez - 
= 1
D. ey - ez + 
= -1
Mathematics
The two triangles below are similar. Find the unknown side lengths.
A. x = 3.5; y = 3.6 B. x = 3.5; y = 3.9 C. x = 2.24; y = 3.6 D. x = 4.0; y = 3.9
Mathematics
Simplify using the rules for raising a quotient to a power and raising a fraction to a negative power.
-6
A. 
B. 
C. 
D. 6
Mathematics
Solve the equation by first clearing decimals. 21.2 + 4.2t = 5.66
A. -3.7 B. -13.8 C. 57.94 D. -15.54
Mathematics