As a result of the installation of a muffler, the noise level of an engine was reduced from 89 to 72 decibels. find the percent decrease in the intensity level of the noise due to the installation of the muffler.(round your answer to the nearest whole number

Step-by-step explanation:

Using the formula

Initial -final/initial =%/100

89-72/89 =%/100

17/89 =%/100

Making %subject of the formula

% =17*100/89

So % =1700/89

%= 19.101

Therefore rounding off the answer we have

X=19%

452,489 to the nearest thousand is 452,000

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}