Do the operation and express the answer in a + bi form.
A) - 100 i
B) 10 i
C) - 10 i
D) 10
E) - 10
E) - 10
Mathematics
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Solve and check. Use the square root principle to eliminate the square.(r + 4)2 = 10
A. 4 ± 
B. -4 ± 
C. ±
D. 6
Mathematics
Provide an appropriate response.Perform the indicated operation: 
A. 20 B. -20 C. 9 D. -9
Mathematics
Provide an appropriate response.Simplify the expressions (2x)0 and (2x0) and explain how you arrived at your answers.
What will be an ideal response?
Mathematics
?The probability of recall in an experiment is modeled by 
, 
where x is the percent of recall. What is the probability of recalling between 50% and 80%? Round your answer to three decimal places.
?
A. ?0.387 B. ?0.221 C. ?0.685 D. ?0.173 E. ?0.867
Mathematics