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3 years ago

8

(please zoom / zoom out if needed to see question. (: )

2 answers:

lisov135 [29]3 years ago

7 0

You essentially have four triangles. The area of a triangle is: A=bh/2 (b=base length and h=height)

So the area is simply the sum of the four triangle areas...

A=(3*2)/2+(3*2)/2+(7*2)/2+(7*2)/2

A=20 ft^2

ELEN [110]3 years ago

3 0

Area of top left triangle inside the kite = 2x3 = 6 divide by 2 = 3 square feet
area for top right triangle is 7x2 = 14 divide by 2 = 7 square feet
add together to get total area of top half = 10 square feet
double it to get bottom half as well, so total area is 20 square feet

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The plot shown below describes the relationship between student scores on the first exam in a class and their corresponding scor

STALIN [3.7K]

Answer:

you average the scores by adding scores from exam 1 and exam 2 then divide it by 2 to average the exam scores

Step-by-step explanation:

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3 years ago

A Simple random sample of 100 8th graders at a large suburban middle school indicated that 84% of them are involved with some ty

Setler [38]

Answer: a) (0.755, 0.925)

Step-by-step explanation:

Let p be the population proportion of 8th graders are involved with some type of after school activity.

As per given , we have

n= 100

sample proportion: $\hat{p}=0.84$

Significance level : $\alpha= 1-0.98=0.02$

Critical z-value : $z_{\alpha/2}=2.33$ (using z-value table)

Then, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity will be :-

$\hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

i.e. $0.84\pm (2.33)\sqrt{\dfrac{0.84(1-0.84)}{100}}$

i.e. $\approx0.84\pm 0.085$

i.e. $(0.84- 0.085,\ 0.84+ 0.085)=(0.755,\ 0.925)$

Hence, the 98% confidence interval that estimates the proportion of them that are involved in an after school activity : a) (0.755, 0.925)

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3 years ago

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zalisa [80]

Answer:

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Step-by-step explanation:

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4 0

3 years ago

The measurement around the trunk of a tree just below shoulder height is called girth. The largest known american beech tree in

Bumek [7]

Answer:

24 1/6 - 19 5/12=

24 1/6÷12- 19 5/12÷12

24 2/2- 19 5/1= 5 3/1

3÷1= 3

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Step-by-step explanation:

Step 1: Do the lcd and the number in between what you do is multiply the number next to it.

Step 2: Then subtract the mixed numbers and you get your answer.

Step 3: Divide 3 by 1

Step 4: Divide 3 by 5 and answer is 3 1/2

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4 years ago

Help!<br><br> What is the log of 10^-4.5?

Anarel [89]

The answer would be approximately 1.98

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3 years ago

Read 2 more answers