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3 years ago

I need help plz help

Mathematics

2 answers:

vekshin13 years ago

6 0

Equation: 55 miles X 7 hours. This means you would travel 385 miles in 7 hours.

Zolol [24]3 years ago

4 0

You have to multiply the speed and the time

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The graph shows the total mass loss of the Greenland ice sheet since 2007. Write a conjecture using the graph.

Gelneren [198K]

The conjecture or hypothesis given based on the attached graph is that there has been a general increase in the total loss of the Greenland Ice Sheet since 2007. However, since 2013, the rate at which the total loss increased began to decline.

<h3>What is a conjecture in math?</h3>

In mathematics, a hypothesis or a conjecture is a speculative conclusion or assertion that is stated without evidence.

<h3>How do you write a Conjecture ?</h3>

You must discover a trend or make some type of remark. For example, you may have observed that the list is increasing by twos.

You draw a conclusion based on the pattern you saw, just as you did when you determined that 18 would be the following number.

Learn more about conjectures:
brainly.com/question/24813201
#SPJ1

4 0

2 years ago

How many places do you need to move the decimal to the left to write the number below in the scientific notation?

Zolol [24]

Answer:

Step-by-step explanation:

in scientific notation a number cant be greater than 10. so you have to move the decimal to make it under 10.

4 0

3 years ago

About 10% of people in the United States are left handed. Suppose we take a sample of 120 U.S. Residents, and let X = the number

olganol [36]

Answer:

1) $E(X) = np = 120*0.1 =12$

$SD(X) = \sqrt{np(1-p)}= \sqrt{120*0.1*(1-0.1)} =3.286$

For this case we can interpret that the expected variation around the mean is about 3.3 people approximated

2) $P(X\geq 16)$

And we can use the normal approximation given by:

$X \sim N(12, \sigma =3.286)$

And we can use the z score formula given by:

$z = \frac{X -\mu}{\sigma}$

And if we find the z score for 16 we got:

$z = \frac{16-12}{3.286}= 1.217$

And we can find this probability using the normal standard distribution or excel and we got:

$P(Z>1.217) = 0.112$

3) For this case we can conclude that the probability to find 16 or more individuals left handed in a sample of 120 is about 0.112 or 11.2%

Step-by-step explanation:

Let X represent the random variable for the number of residents who are left handed

And for this case we can model this variable with this distirbution:

$X\sim Binom(n= 120 , p =0.1)$

Part 1

The mean is given by:

$E(X) = np = 120*0.1 =12$

And the deviation would be:

$SD(X) = \sqrt{np(1-p)}= \sqrt{120*0.1*(1-0.1)} =3.286$

For this case we can interpret that the expected variation around the mean is about 3.3 people approximated

Part 2

We want to calculate this probability:

$P(X\geq 16)$

And we can use the normal approximation given by:

$X \sim N(12, \sigma =3.286)$

And we can use the z score formula given by:

$z = \frac{X -\mu}{\sigma}$

And if we find the z score for 16 we got:

$z = \frac{16-12}{3.286}= 1.217$

And we can find this probability using the normal standard distribution or excel and we got:

$P(Z>1.217) = 0.112$

Part 3

For this case we can conclude that the probability to find 16 or more individuals left handed in a sample of 120 is about 0.112 or 11.2%

7 0

3 years ago

The park james's house used to have a bike trail that was 12.347 kilometers long. Last year, the trail was reduced to 9.432 kilo

soldi70 [24.7K]

12.347
- 9.432
------------
2.915

The answer is:
D. 2.915 kilometers

3 0

4 years ago

Read 2 more answers

There are 24 girls, there are 2/3 of the girls on Monday 1/4 girls on Tuesday, and 1/6 girls on Wednesday. How many more girls a

marshall27 [118]

Answer:

Step-by-step explanation:

24/3 = 8

8*2= 16

24/4 = 6

16-6=10

5 0

3 years ago