Answer:
(114.123, 115.877)
Step-by-step explanation:
Given that :
Sample size (n) = 500
Mean = 23% of 500 = 115
Standard deviation (s) = 2% of 500 = 10
α = 95%
Zcritical at 95% = 1.96
Confidence interval = Mean ± Error
Error = Zcritical * standard deviation /sqrt (n)
Error = 1.96 * 10/sqrt(500)
Error = 0.8765386
Lower boundary : 115 - 0.8765386 = 114.1234614
Upper boundary : 115 + 0.8765386 = 115.8765386
(114.123, 115.877)
4x^2 + 4 (-4).
Factor GCF: 4(x^2-4).
Factor: 4 (x + 2) (x - 2).
B. Answer
1 yd = 3 ft
39 ft/m = 13 yd/m
1 min = 60 sec
13 yd/60 sec = .21667 yd/sec
Answer:
8.5
Step-by-step explanation: