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dangina [55]
3 years ago
11

While exercising Julie found that her. Heart was beating 12times every 5 seconds how many times was it beating per min

Mathematics
2 answers:
Vika [28.1K]3 years ago
7 0
12 times / 5 seconds * (60 seconds / 1 min) = 144 times / min
Katyanochek1 [597]3 years ago
6 0

Answer: 144.

Step-by-step explanation:

Given : While exercising Julie found that her. Heart was beating 12 times every 5 seconds .

Number of times heart  beats in 1 second =\dfrac{12}{5}

Since, 1 minute = 60 seconds

Then, Number of times heart beats in 60 second =\dfrac{12}{5}\times60=144

Hence, the number of times heart beats in 1 minute = 144.

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3 years ago
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Which expression is equivalent<br>HELP ME PLEASE
aalyn [17]

Answer:

the 4th option is correct

Step-by-step explanation:

xy^{2/9}   Original expression

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3 years ago
-5x + 12 - 7x = -3(5x + 8)
nikitadnepr [17]

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Expand

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Simplify 12x + 12 + 15x to 3x + 12

3x + 12 = -24

Subtract 12 from both sides

3x = -24 - 12

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3x = -36

Divide both sides by 3

x = -36/3

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3 years ago
48% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually
oksian1 [2.3K]

Answer:

There is no sufficient evidence to support the executive claim

Step-by-step explanation:

From the question we are told that

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      The  sample proportion is  \r p  =  0.45

       The sample  size is  n  =  300

       The  level of significance is \alpha  =  0.02

The null hypothesis is  H_o  :  p=  0.48

The  alternative hypothesis is  H_a  :  p \ne  0.48

   Generally the test statistics is mathematically evaluated as

           t =  \frac{\r p  -  p  }{ \sqrt{ \frac{p(1 -  p )}{n} } }

=>        t =  \frac{0.45   -  0.48   }{ \sqrt{ \frac{0.48 (1 -  0.48 )}{300} } }

=>       t =  -1.04

The  p-value is mathematically represented as

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Form the z-table  

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=>   p-value  =  2 * 0.15

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Given that  p-value  >  \alpha  we fail to reject the null hypothesis

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The values of sine and cosine are always between 0 and 1. True or False
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Also, the ratio of any side of a triangle and the hypotenuse is always less than 1.

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3 years ago
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