Answer:

Step-by-step explanation:
-The margin of error is calculated using the formula:

-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:

Hence, the population standard deviation is 547.1125
Answer:
I DESERVE BRAINLIEST
Step-by-step explanation:
C=5.5*2*PI
C=11*pi
C=34.5575191895
C= 34.56
A=pi*5.5^2
A=30.25*Pi
A= 95.0331777711
A= 95.03
Answer:
24
Step-by-step explanation:
60% of 50 is equivalent to 24 so he answered 24 questions correctly
Answer:
a rectangular prism
Step-by-step explanation:
consists of 6 faces which are rectangles