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zmey [24]
3 years ago
7

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
Mathematics
1 answer:
Jobisdone [24]3 years ago
4 0

Answer:

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%

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Maurinko [17]

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C.) can pass the test since it's a horizontal line.

Hope this helps!

6 0
3 years ago
He function y = 2x2 + 4x – 6 is graphed.
Harlamova29_29 [7]

Answer:

2                 -3 and 1

Step-by-step explanation:

3 0
3 years ago
Ferris wheel has a diameter of 60 ft. How far will a rider travel during a 5 minute ride if the wheel rotates once every 15 seco
Neporo4naja [7]

Answer:

3769.92 ft

Step-by-step explanation:

The diameter of the wheel, d= 60 ft

We know the perimeter of the wheel is,

= πd

= 3.1416*60

= 188.496 ft

Wheel travel for 5 minutes. So the wheel travel,

= 5*60

= 300 sec

The wheel rotates in every 15 seconds. So the wheel rotates,

= 300/15

= 20 times

In one rotation, the wheel travels its perimeter. so is 5 minutes it travels,

= 188.496*20

= 3769.92 ft

5 0
3 years ago
Maria made 171 for 9 hours of work. at the same rate, how much would she make for 7 hours of work
Amanda [17]

Answer: 133

Step-by-step explanation:

171 for 9 hours

171/9 equals 19

So 19 dollars per hour

7 hours times 19 dollars per hour equals 133

4 0
3 years ago
Read 2 more answers
What is 52,327 rounded to the nearest ten thousand
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Answer:

50,000

Step-by-step explanation:

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2 years ago
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