Solve using the quadratic formula. Use a calculator to approximate the solution to three decimal places.
x2 + 
= x
A. 3 ± 2.449
B. 3 ± 2.449i
C. 3 + 2.449i
D. -0.3 ± 2.449i
Answer: B
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 4x + 6y
A. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c > 0
B. Domain: all points in the xy-plane; range: real numbers z ? 0 ; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
D. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
Find a parametrization for the line segment beginning at P1 and ending at P2.P1(-5, 2, -1) and P2
A. x = 5t - 5, y = 2, z = 
t - 1, 0 ? t ? 1
B. x = -5t, y = 2, z = - 
t + 1, 0 ? t ? 1
C. x = -5t, y = 2t, z = - 
t + 1, 0 ? t ? 1
D. x = 5t - 5, y = 2t, z = 
t - 1, 0 ? t ? 1
Match the inequality with its correct representation.
A. 0 < x ? 4 B. 0 ? x ? 4 C. 0 < x < 4 D. 0 ? x < 4
Solve the problem.If interest is compounded continuously (daily compounded interest closely approximates this), with an interest rate i (expressed as a decimal), a bank account will double in t years according to 
. Find i if the account is to double in 7 years.
A. 9.90 B. 0.0990 C. 68.31 D. 0.1090