Find 
. Express the answer in standard form.z1 = 9(cos 45° + i sin 45°)z2 = 3(cos 135° + i sin 135°)
A. -3i
B. 3
- 3i
C. -3i
D. 3i
Answer: C
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Find all complex zeros of the polynomial function. Give exact values. List multiple zeros as necessary.f(x) = x3 + 7x2 - 16x + 18
A. 1 + i, -9, 9 B. 1 + i, 1 - i, 9 C. 1 + i, 1 - i, -9 D. 1 + i, 1 - i, 9i
Solve the problem.The number of acres in a landfill is given by the function 
where t is measured in years. How many acres will the landfill have after 9 years? (Round to the nearest acre.)
A. 2487 acres B. 3114 acres C. 1352 acres D. 1384 acres
Provide an appropriate response.Are both 
and 
natural numbers, integers, or irrational numbers?
A. Integers B. Natural numbers C. Irrational numbers D. None of the above
Find the product.(x - y)(x2 - 3xy + y2)
A. x3 + 4x2y - 4xy2 - y3 B. x3 + 2x2y - 2xy2 - y3 C. x3 - 4x2y + 4xy2 - y3 D. x3 - 2x2y + 2xy2 - y3