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3 years ago

Question 1. -29 + |-43| = __

Mathematics

1 answer:

IgorLugansk [536]3 years ago

5 0

Answer:

Question 1: 14

The absolute value of negative 43 is 43 and if you do -29 plus 43 or also 43-29, you get 14.

Question 2: Basically absolute value precisely means "non-negative". In other words the absolute value in a number' distance from 0. (But remember that distance is always positive!) To find the absolute value of -43, you find the distance that -43 is from 0. Since distance is always positive, the absolute value of -43 is 43.

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Which number is equal to 10 Superscript negative 3

timama [110]

Answer:

1/1000 or 0.001.

Step-by-step explanation:

10 ^-3

= 1/10^3

= 1/1000.

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3 years ago

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Answer:

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Step-by-step explanation:

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4 years ago

If you cut a 35 inch long stick in two pieces in the ratio 2:3, how long would each part be?

Aliun [14]

Answer:

14 : 21

Step-by-step explanation:

---> 2:3 ----> 2+3=5

---> Stick's length = 35 inches

For the first portion

2/5 x 35

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3 years ago

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3 years ago

A researcher at the University of Washington medical school believes that energy drink consumption may increase heart rate. Supp

Nana76 [90]

Answer:

Step-by-step explanation:

Given that:

mean μ = 70

sample size = 25

sample mean = 73

standard deviation = 7

level of significance = 0.10

The null hypothesis and the alternative hypothesis can be computed as follows:

$\mathtt{H_o : \mu = 70} \\ \\ \mathtt{H_1 : \mu > 70 }$

The z score for this statistics can be calculated by using the formula:

$z = \dfrac{X- \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$z = \dfrac{73- 70}{\dfrac{7}{\sqrt{25}}}$

$z = \dfrac{3}{\dfrac{7}{5}}$

$z = \dfrac{3 \times 5}{{7}{}}$

z = 2.143

At level of significance of 0.10

degree of freedom = n -1

degree of freedom = 25 - 1

degree of freedom = 24

The p - value from the z score at level of significance of 0.10 and degree of freedom of 24 is:

P - value = 1 - (Z < 2.143)

P - value = 1 - 0.9839

P - value = 0.0161

Decision Rule: since P value is lesser than the level of significance, we reject the null hypothesis.

Conclusion: We conclude that energy drink consumption increases heart rate.

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3 years ago