Solve the equation.8x - 4x + 3x = 28
A. 
B. 
C. 21
D. 4
Answer: D
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Find the logarithm. Give an approximation to four decimal places.log 0.00538
A. -2.2612 B. -5.2251 C. -2.2692 D. -2.2774
Provide an appropriate response.Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient of x2 should be positive or negative. DENTAL FLOSS USE 
Years since 2000
A. Quadratic; positive B. Linear; negative C. Quadratic; negative D. Linear; positive
Which of the following physical situations would best be modeled by the graph?
A. The length y of a shadow cast by a tree between sunrise and noon, where t is the angle of elevation of the sun.
B. The monthly average ocean temperature y in degrees Fahrenheit during month t, where t = 1 corresponds to January.
C. The length y of a shadow cast by a horizontal flagpole on a vertical wall between sunrise and noon, where t is the angle shown.
D. The number of hours y of sunlight during month t, where t = 1 corresponds to January.
Simplify.
A. 4 B. 20 C. -20 D. -4