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3 years ago

Draw to show the regrouping. Write the difference two ways. Write the tens and ones. Write the number. Subtract 9 from 35

Mathematics

1 answer:

Murrr4er [49]3 years ago

4 0

You would be able to find this out using the calculator

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Intellectual development (Perry) scores were determined for 21 students in a first-year, project-based design course. (Recall th

Anit [1.1K]

Answer:

The 99% confidence interval is (3.0493, 3.4907).

We are 99% sure that the true mean of the students Perry score is in the above interval.

Step-by-step explanation:

Our sample size is 21.

The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So

$df = 21-1 = 20$ .

Then, we need to subtract one by the confidence level $\alpha$ and divide by 2. So:

$\frac{1-0.99}{2} = \frac{0.01}{2} = 0.005$

Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 20 and 0.005 in the two-sided t-distribution table, we have $T = 2.528$

Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So

$s = \frac{0.40}{\sqrt{21}} = 0.0873$

Now, we multiply T and s

$M = 2.528*0.0873 = 0.2207$

Then

The lower end of the interval is the mean subtracted by M. So:

$L = 3.27 - 0.2207 = 3.0493$

The upper end of the interval is the mean added to M. So:

$LCL = 3.27 + 0.2207 = 3.4907$

The 99% confidence interval is (3.0493, 3.4907).

Interpretation:

We are 99% sure that the true mean of the students Perry score is in the above interval.

7 0

3 years ago

Plsss help pay money of mark brainlist

Zepler [3.9K]

Answer:

yes, ASA

Step-by-step explanation:

You have two angles and the included side of two triangles, so you can prove the triangles are congruent by ASA.

3 0

3 years ago

Read 2 more answers

19. The areas of corresponding faces of two similar hexagonal prisms are 25 cm² and 121 cm². What is the ratios of the correspon

Pie

ANSWER

I) 5:11

ii) 5:11

iii) 125:1331

EXPLANATION

Let the side lengths be in the ratio:

x:y

This implies that the area will be in the ratio:

$\frac{ {x}^{2} }{ {y}^{2} } = \frac{25}{121}$

Take positive square root.

$\frac{x}{y} = \sqrt{ \frac{25}{121} }$

$\frac{x}{y} = \frac{5}{11}$

Hence the sides are in the ratio:

x:y=5:11

The perimeter of the smaller hexagon is 6×5=30

The perimeter of the larger hexagon is 6×11=66

The ratio of the perimeter is

30:66=5:11

The volume will be in the ratio

5³:11³

125:1331

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3 years ago

Solve the proportion 8 000 3 1 a C. 8 b. 001001 d 9

kozerog [31]

Answer: what kinda math is this if i may ask?

Step-by-step explanation:

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3 years ago

Divide. Round to the nearest tenth? 2.1/1.488

mario62 [17]

1.4 . Simply divide the two numbers and round to the first number spot to the right of the decimal point.

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3 years ago