Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 5(cos 35° + i sin 35°), z2 = 2(cos 40° + i sin 40°)
A. 7(cos 50.9° + i sin 50.9°)
B. 10(cos 50.9° + i sin 50.9°)
C. 10(cos 75° + i sin 75°)
D. 7(cos 75° + i sin 75°)
Answer: C
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Determine whether the given lines are parallel, perpendicular, or neither.9x + 4y = -15y = - 
x - 16
A. Parallel B. Perpendicular C. Neither
Solve the problem.The table below summarizes the construction cost of a set of homes (excluding the lot cost) along with the square footage of the home's floor space. Find a linear equation that relates the construction cost in thousands of dollars to the floor space in hundreds of square feet by finding the least squares line for the data.
A. y = 8.13x - 12.79 B. y = 7.87x - 13.08 C. y = 8.13x D. y = 7.97x - 13.54
Sketch the graph of the function and find the domain and range.f(x) = (x + 3)2 - 1
A. 
domain: {x|-? < x < ?}
range: {y|y ? -1}
B. 
domain: {x|-? < x < ?}
range: {y|y ? 3}
C. 
domain: {x|-? < x < ?}
range: {y|y ? 1}
D. 
domain: {x|-? < x < ?}
range: {y|y ? -3}
Determine the slope and y-intercept of the function.p(x) = -x - 6
A. m = -1; b =-6 B. m = 0; b = -6 C. m =1; b = 6 D. m = -1; b = 6