Find an upper bound for the magnitude |E| of the error in the approximation f(x, y) ? L(x, y) at the given point over the given region R.
at 
; R: |x + 6| ? 0.1, |y + 8| ? 0.1
A. |E| ? 0.06
B. |E| ? 0.09
C. |E| ? 0.12
D. |E| ? 0.03
Answer: C
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Multiply.(5 + x)(3x + 11)
A. 3x2 + 25x + 55 B. 3x2 + 26x + 55 C. x2 + 26x + 26 D. 3x2 + 55x + 26
Find z1z2. Write the answer in polar form with the argument between 0° and 360°.z1 = 1 + i, z2 = 
- i
A. 2
(cos 75° + i sin 75°)
B. 2
(cos 345° + i sin 345°)
C. 2
(cos 15° + i sin 15°)
D. 
(cos 15° + i sin 15°)
Solve the problem.Suppose that the population of a certain city during a certain time period can be approximated by 
where x is time in years since 2010. By sketching a graph of P(x), estimate during what time period the population of the city would be increasing.
A. Between 2015 and 2045 B. Between 2010 and 2024 C. Between 2015 and 2038 D. Between 2010 and 2038
Provide an appropriate response.For what values, if any, of x (x ? 0) and n will x-n be a negative number?
What will be an ideal response?