Given that 
, find 
.
A. 486
B. 324
C. 225
D. 108
E. limit does not exist
Answer: C
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Find a 95% confidence interval for the true population proportion.In a random sample of 186 births at one hospital, 33% were by Caesarean section.
A. 25.7% to 40.3% B. 32.9% to 33.1% C. 29.3% to 36.7% D. 32.5% to 33.5%
Perform the indicated operations and express your answer in the form a + bi. 
A. -3i
B. 3i
C. ±3
D. -i
Simplify the expression. Assume that all variables are positive when they appear.9
- 6
+ 10
A. 1248
B. -1248
C. 9
D. 138
A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = {3n}
A. r = 3; s1 = 3, s2 = 6, s3 = 9, s4 = 12 B. r = 3n; s1 = 3, s2 = 6, s3 = 9, s4 = 12 C. r = 3; s1 = 3, s2 = 9, s3 = 27, s4 = 81 D. r = 3n; s1 = 3, s2 = 9, s3 = 27, s4 = 81