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3 years ago

PLEASE HELP ASAP start off by restating: Historians know about the past before there were written records by studying artifacts

1 answer:

3 0

Both archaelogists and historians use sources and evidence to learn about the past. Archaeologists learn about the past by studying artefacts. Historians find out about the past by studying written sources (ie what people wrote). Written sources are stored in an archive.

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Can someone help me please

ahrayia [7]

Answer:

hieght at left is 24+1

and right is 25 both are equal now so h=25

base=8

area of triangle 1/2×b×h

1/2×8×25=100

7 0

3 years ago

Read 2 more answers

Please please please help me

Fiesta28 [93]

Answer:

4x and 5.9

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

12. A research study was conducted to estimate the number of white perch (a type of fish) in a Midwestern lake. 300 perch were c

Artyom0805 [142]

Answer:

If the scientist’s estimate about the number of fish in the lake is correct, then it is 44% likely to get 20 perch out of 50 with a tag.

Step-by-step explanation:

Let p be the proportion of tagged white perch in the Midwestern lake.

Scientist's claim is that p= $\frac{300}{1000} =0.30$

Let's test this hypothesis as:

$H_{0}:$ p=0.30

$H_{a}:$ p≠0.30

P-value of the test statistic will give the likelihood of getting 20 perch out of 50 with a tag if the scientist's estimate ( $H_{0}$ ) is true.

Test statistic can be calculated using the equation

$z=\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } }$ where

p(s) is the sample proportion of white perch ( $\frac{20}{50} =0.25$ )

p is the proportion assumed under null hypothesis. (0.30)

N is the sample size (50)

Then $z=\frac{0.25-0.30}{\sqrt{\frac{0.30*0.70}{50} } }$ ≈ -0.77

Two tailed p-value of the test statistic is ≈ 0.44

Thus if the scientist’s estimate about the number of fish in the lake is correct, (p=0.30) then it is 44% likely to get 20 perch out of 50 with a tag.

4 0

3 years ago

Will give brainliest pls help :D

irga5000 [103]

❤ Hi There!! ❤

The answer is below!!

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Step-by-step explanation:

find the number line best shows how to solve −8 − (−6)

In the number line first we start with -8 . negative and negative becomes positive

from -8 move 6 units to the right. So it ends at -2

A number line from negative 10 to 10 is shown with numbers labeled at intervals of 2. An arrow is shown from point 0 to negative 8. Another arrow points from negative 8 to negative 2.

So, The answer is:

A number line from negative 10 to 10 is shown with numbers labeled at intervals of 2. An arrow is shown from point 0 to negative 8. Another arrow points from negative 8 to negative 2.

P.S Tell me if this is wrong....

$GoodLuck!!$