Find each percent decrease round to the nearest percent from 145 pounds to 132 pounds

Mathematics

2 answers:

BabaBlast [244]3 years ago

7 0

9% decrease because 145-132=13
13=9% of 145

eimsori [14]3 years ago

5 0

Hello,

What LacyMarie answered is right.

First Method :

145 pounds --> 100%
132 pounds --> x %

So x = 132*100/145 = 91 %

Now you just have to do 100 - 91 = 9 % decrease from 145 pounds to 132 pounds.

Second method :

145 - 132 = 13 right ?

145 pounds --> 100 %
13 pounds --> x %

So x = 13*100/145 = 9 %

The answer is 9 % decrease from 145 to 132.

I gave you 2 methods, do as you wish now !

Hope this helps !

Photon

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A medical devices company wants to know the number of hours its MRI machines are used per day. A previous study found a standard

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The company has to study 199 machines.

In statistics, the standard deviation is a measure of the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean of the set, while a high standard deviation indicates that the values are spread out over a wider range.

It is given that;

Margin of error E = 0.7

Confidence interval 98% = 1-0.98 = 0.02

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Number of MRI machines needed per day n, = [(z alpha/2 * SD)/E]²

Z alpha/2 = 1.645 at alpha = 0.1

Inputting these values into n we have that

[(1.645*6)/0.7]²

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To know more about standard deviation visit: brainly.com/question/475676