Provide an appropriate response.A rectangle has a length of 
and a width of 
. What is the best estimate for its area?
A. 110
B. 132
C. 120
D. 121
Answer: B
Mathematics
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Find the value of df-1/dx at x = f(a).f(x) = 5x2, x ? 0, a = 2
A. 
B. 20
C. 
D. 
Mathematics
Simplify the expression. Express the answer so that all exponents are positive. Whenever an exponent is 0 or negative, we assume that the base is not 0.(2xy)3
A. 
B. 8xy
C. 2x3y3
D. 8x3y3
Mathematics
Graph the function and give its domain and its range.f(x) = 
A. [0, ?); [-3, ?)
B. [3, ?); [0, ?)
C. [-3, ?); [0, ?)
D. [0, ?); [3, ?)
Mathematics
Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(6, 8)}
B. no solution; ?
C. {(8, 6)}
D. infinitely many solutions; {
x - 8 = y} or {
y + 6 = x}
Mathematics