What is the value of 4/15 divided by 2/3 as a fraction

Mathematics

2 answers:

user100 [1]3 years ago

8 0

Step-by-step explanation:

pls mark me as brainliest

coldgirl [10]3 years ago

7 0

Answer:

Step-by-step explanation:

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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

4vir4ik [10]

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

Standard deviation = 6 hours

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

= 14.1²

= 198.81 is approximately equal to 199

The company has to study 199 machines.

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

8 0

2 years ago

Determine the time needed to deliver 72 papers at a rate of 9 papers in 18 minuets

monitta

Hey there,

Question : Determine the time needed to deliver 72 papers at a rate of 9 papers in 18 minuets

Answer :
9 papers = 18 min
1 paper = 18 / 9
= 2 min
72 papers = 2 x 72
= 144 mins

Hope this helps :))

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3 0

3 years ago

What is the volume of the sphere that has a diameter of 3? use 3.14 for pie

aev [14]

Hey ! there

Answer:

113.04 unit cube

Step-by-step explanation:

In this question we are provided with a sphere having radius 3 units and value of π is 3.14 . And we're asked to find the volume of sphere .