Just a random guess 22,275 tell me if it right
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:
its 16
as we know the square root of 64 is 6 and when it is multiplied by 2 its answer is 16.
Step-by-step explanation:
2 - 2 x 3 + 3
= 2 - 6 + 3
= -4 + 3
= -1