Answer: 2.28%
Step-by-step explanation:
Given: An airport find that at the present time, the mean noise level is 103 decibels and the standard deviation is 5.4 decibels.
The distribution of noise levels(x) for all jets during takeoff over the neighborhood has a normal distribution.
The probability that jets have a noise level less than 92.2 decibels when taking off over this neighborhood will be :-
Hence, the percent of these jets have a noise level less than 92.2 decibels when taking off over this neighborhood = 2.28%
The percentage of increase was 87.027... %
<em><u>Explanation</u></em>
The value of U.S exports to China increased from $1480 million to $2768 million.
Suppose, the percentage of increase is 
So, <u>the amount of increase</u> = of 1480 
Thus, the equation will be......
So, the percentage of increase was 87.027... %
<h3><u>Answer</u> :- </h3>
c) 0.01
<h3><u>Solution</u> :-</h3>
To Write percentage in decimal or fraction we divide it by 100
therefore,
Half of 0.02 = 
If they saved £29 all together, and if each of them saved the same amount,
then each saved £29/4 = £7.25 or £7 and 25p.
(Before decimalization in 1971, £7.25 would have been £7 and 5s .)
