Perform the indicated operation. Write the result in the form a + bi.(
+ 2i)(
- 2i)
A. 8 - 4i
B. 4 + 0i
C. 8 - 2i
D. 12 + 0i
Answer: D
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Solve the problem.The following scatter diagram shows heights (in inches) of children and their ages.Height (inches)
Age (years)What is the expected height range for a 2-year old child?
A. 25-38 inches B. 35-45 inches C. 40-50 inches D. 20-30 inches
Solve the problem.Suppose the lengths of the sides of a triangle are a, b, and c as illustrated in the figure. 
If the semiperimeter of the triangle is s = 
(a + b + c), then the area of the triangle is A = 
.Find the area of the triangle with sides a = 20, b = 44, and c = 56. Give the exact answer and then the answer rounded to the nearest hundredth.
A. 160
sq units, 391.92 sq units
B. 80
sq units, 195.96 sq units
C. 40
sq units, 97.98 sq units
D. 320
sq units, 554.26 sq units
Provide an appropriate response.Why is it not possible for a function defined by a polynomial of degree 4 with real coefficients to have zeros of 2, 3, 5, and 1 + i?
What will be an ideal response?
Use a graphing calculator to evaluate the series.
A. 2325 B. 2235 C. 279 D. 1600.5