Find z1z2. Write your answer in standard polar form with the argument in radians.z1 = 
, z2 = 
A. 3
B. 3
(cos 0 + i sin 0)
C. 3
(sin 0 + i cos 0)
D. 3
Answer: B
Mathematics
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Determine if the piecewise defined function is differentiable at the origin.f(x) = 
A. Not differentiable B. Differentiable
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Find the area of the trapezoid.
A. A = 345 cm2 B. A = 45 cm2 C. A = 161 cm2 D. A = 225 cm2
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Solve the problem.One maid can clean the house in 7 hr. Another maid can do the job in 8 hr. How long will it take them to do the job working together?
A. 3
hr
B. 
hr
C. 56 hr
D. 
hr
Mathematics
The concentration of a drug in an organ at any time t (in seconds) is given by 
where x(t) is measured in grams/cubic centimeter (g/cm3).
?
Select the graph of x.
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics