Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 2 + 2i, z2 = 
- i
A. 4
(cos 345° + i sin 345°)
B. 4(cos 345° + i sin 345°)
C. 4
(cos 15° + i sin 15°)
D. 4(cos 15° + i sin 15°)
Answer: C
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At what points is the given function continuous?f(x, y, z) = 
A. All (x, y, z) such that x ? 0 and y + z ? 0 B. All (x, y, z) in the first octant C. All (x, y, z) such that x - y - z ? 0 D. All (x, y, z)
Given the term, idenitfy the coefficient, the variable, and the exponent of the variable.-k6
A. coefficient: 6 variable: k exponent: 1 B. coefficient: 1 variable: k exponent: 6 C. coefficient: -1 variable: k6 exponent: 0 D. coefficient: -1 variable: k exponent: 6
Find the acute angle ?, to the nearest hundredth of a degree, for the given function value.sec ? = 6.965
A. 8.25° B. 81.74° C. -8.17° D. 8.17°
Simplify. Assume that variables can represent any real number.
A. 3z3
B. 3z2
C. 9z3
D. 9z2