Answer:
(c) 43.
Step-by-step explanation:
Given:
Margin of error (E) = 2
Sample variance
= 44
Confidence level = 95%
The z- value at 95% confidence level is 1.96.
The sample using the provided information can be calculated as:
![n=(\frac{z(s)}{E})^{2} \\n=\frac{z^{2} s^{2} }{E^{2} } \\n=\frac{1.96^{2} (44) }{2^{2} }\\n= 42.52\\n=43](https://tex.z-dn.net/?f=n%3D%28%5Cfrac%7Bz%28s%29%7D%7BE%7D%29%5E%7B2%7D%20%5C%5Cn%3D%5Cfrac%7Bz%5E%7B2%7D%20s%5E%7B2%7D%20%7D%7BE%5E%7B2%7D%20%7D%20%5C%5Cn%3D%5Cfrac%7B1.96%5E%7B2%7D%20%2844%29%20%7D%7B2%5E%7B2%7D%20%7D%5C%5Cn%3D%2042.52%5C%5Cn%3D43)
Hence, the correct option is (c) 43.
Answer:
65
Step-by-step explanation:
520/8=65 so approximately 65 kids play soccer
Answers:
___________________________In fraction:
![\frac{19}{50}](https://tex.z-dn.net/?f=%20%5Cfrac%7B19%7D%7B50%7D)
.
___________________________In decimal:
0.38 .
_________________In percent:
38 % .
_________________Explanation:_________________19/50 = (19*2)/(50*2) = 38/100 .
38/100 = 38 ÷ 100 = 0.38 .
38/100 = 38 % .
___________________________
12 inches in 1 foot
12*12*12 cubic inches in 1 cubic foot = 1728 in^2
So 7125 in^3 = 7125/1728 = 4.123 ft^3 to nearest thousandth