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Korvikt [17]
2 years ago
13

A scientist who studies sleep has developed a new technique to help people sleep each night. He

Mathematics
1 answer:
Andru [333]2 years ago
7 0

Considering the situation described, the scientist's null and alternative hypothesis are described by:

Null hypothesis H_0: \mu = 0; Alternative hypothesis H_1: \mu \neq 0.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if there is no difference, that is, the difference of the means represented by \mu is of 0, hence:

H_0: \mu = 0

At the alternative hypothesis, it is tested if there is a difference, hence:

H_1: \mu \neq 0

More can be learned about an hypothesis test at brainly.com/question/26454209

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George walks to a friend's house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 mete
Hunter-Best [27]

Answer:

The velocity in meter per seconds is 76.9m/s

Step-by-step explanation:

The total distance walked is 1000m

Velocity= distance/time

= 1000/13

= 76.9m/s

The speed and velocity is used interchangeably therefore the speed is also 76.9 m/s

8 0
3 years ago
Simplify the equation
Arturiano [62]

Answer:

\dfrac{16x^3-37x^2-16x+37}{x^2+2}

Step-by-step explanation:

There aren't any factors that cancel (except 3x). The best you can do is multiply it out.

\displaystyle\frac{\frac{3x^2-3}{x}}{\frac{3(x^2+2)}{16x^2-37x}}=\frac{3(x^2-1)}{x}\cdot\frac{16x^2-37x}{3(x^2+2)}\\\\=\frac{x(x^2-1)(16x-37)}{x(x^2+2)}=\frac{16x^3-37x^2-16x+37}{x^2+2}

7 0
3 years ago
The scale on a map is 1 cm: 7 km. If two cities are 15 cm apart on the map, what is the actual distance between the cities?
Lostsunrise [7]

Answer: C. 105 km

Step-by-step explanation:

By finding out that 1 cm is equal to 7 km, and that the two cities are 15 cm apart you can find it out by doing 7 x 15.

Enjoy. :)

5 0
3 years ago
Read 2 more answers
Andrew is cutting a piece of fencing for his yard. How many pieces of fence that are 5 1/3 inches long can he cut from a section
IrinaVladis [17]

Answer:

2 37/40

Step-by-step explanation:

7 0
3 years ago
7/√10-√3<br> plss faast very urgent​
Bogdan [553]

▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪

Here's the solution :

  • \dfrac{7}{ \sqrt{10 }  -  \sqrt{ 3} }

  • \dfrac{7}{ \sqrt{10} -  \sqrt{ 3}  }  \times  \dfrac{ \sqrt{10}  +  \sqrt{3} }{ \sqrt{10}  +  \sqrt{3} }

  • \dfrac{7( \sqrt{10}  +  \sqrt{3} )}{( \sqrt{ 10}) {}^{2} - (  \sqrt{ {3}})^{2}  }

  • \dfrac{7 (\sqrt{10}  +  \sqrt{3}) }{10 - 3}

  • \dfrac{7( \sqrt{10}  +  \sqrt{3} )}{7}

  • \sqrt{10} +  \sqrt{3}
6 0
3 years ago
Read 2 more answers
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