Combine the complex numbers.(2 - 6i) + (6 + 2i)
A. -4 + 8i
B. 8 - 4i
C. 8 + 4i
D. -8 + 4i
Answer: B
Mathematics
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Solve the problem.A heat duct in the college library has a circular cross section with a radius of 4 inches and a length of 25 feet. How much paint (in square feet) is needed to paint the duct?
A. 314 ft2 B. 628 ft2 C. 26.2 ft2 D. 52.3 ft2
Mathematics
Find the indicated trigonometric ratios.
Find sin A and cos A.
A. sin A = 
; cos A = 
B. sin A = 
; cos A = 
C. sin A = 
; cos A = 
D. sin A = 
; cos A = 
Mathematics
Find:
ÚÄÄÄÄ û-625 a. -1 b. j c. j25 d. 25 e. j625
Mathematics
If the sequence is arithmetic, find the common difference. If the sequence is not arithmetic, say so.3, 6, 12, 24, 48, . . .
A. 6
B. 
C. 2
D. Not arithmetic
Mathematics