Find z1z2. Express the answer in standard form.z1 = 5(cos 150° + i sin 150°)z2 = 2(cos 90° + i sin 90°)
A. -5 - 5i
B. 5
- i
C. 10
- 10i
D. 5 - 20i
Answer: A
Mathematics
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Use a CAS to plot the function near the point x0 being approached. From your plot guess the value of the limit.
A. 
B. 7
C. 0
D. 
Mathematics
Find the indicated sum.
A. -1586 B. -1469 C. -1378 D. -1534
Mathematics
Write the first four terms of the sequence defined by the recursion formula.a1 = -5 and an = -4an-1 for n ? 2
A. -5, 20, -80, 320 B. 5, -20, 80, -320 C. -5, 22, -82, 322 D. -5, -20, -80, -320
Mathematics
Write the number in scientific notation.0.000838
A. 8.38 × 104 B. 8.38 × 10-4 C. 8.38 × 10-5 D. 8.38 × 10-3
Mathematics