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3 years ago

Please help I need to finish Alex before the school day ends, 30 points.

Mathematics

2 answers:

Mariana [72]3 years ago

8 0

Answer:

308 m square

Step-by-step explanation:

divided the solid to two.

1. 4*5*7= 140

2. 7*4*6= 168

140+168=308

Tpy6a [65]3 years ago

4 0

Answer:

Step-by-step explanation:50

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poizon [28]

Angle MNP is correspondent to angle LKI

5 0

3 years ago

Use the given sample data to construct the indicated confidence interval for the population mean. The principal randomly selecte

Lunna [17]

Answer:

The 90% confidence interval

(74.71, 82.63)

Step-by-step explanation:

Confidence Interval Formula is given as:

Confidence Interval = μ ± z (σ/√n)

Where

μ = mean score

z = z score

N = number of the population

σ = standard deviation

The mean is calculated as = The average of their scores

N = 6 students

(71.6 + 81.0 + 88.9 + 80.4 + 78.1 + 72.0 )/ 6

Mean score = 472/6

= 78.666666667

≈ 78.67

We are given a confidence interval of 90% therefore the

z score = 1.645

Standard Deviation for the scores =

s=(x -σ)²/ n - 1 =(71.6 - 78.67)²+(81.0 - 78.67)²+(88.9 - 78.67)² + (80.4 - 78.67)²+ (78.1 - 78.67)²+( 72.0 - 78.67)2/ 6 - 1

= 5.886047531

= 5.89

The confidence interval is calculated as

= μ ± z (σ/√N)

= 78.67 ± 1.645(5.89/√6)

= 78.67 ± 3.9555380987

The 90% confidence interval

is :

78.67 + 3.9555380987 = 82.625538099

78.67 - 3.9555380987 = 74.714619013

Therefore, the confidence interval is approximately between

(74.71, 82.63)

3 0

3 years ago

Josh earns $2700 each summer and puts the money in a savings account with a 4.5% simple interest rate. If he deposits the same a

iragen [17]

Answer: Option 'B' is correct.

Step-by-step explanation:

Since we have given that

Amount Josh earn each summer = $2700

Rate of simple interest = 4.5%

According to question, he deposits the same amount each year.

First summer, he deposited = $2700

In Second summer, he deposited = $2700×2= $5400

In Third summer, he deposited = $2700 × 3=$8100

At the end of his third summer, his money becomes,

$\text{Simple Interest}=\frac{P\times R\times T}{100}\\\\\text{Simple Interest}=\frac{8100\times 4.5\times 1}{100}\\\\\text{Simple Interest}=\$364.5$

As we know the formula for "Amount" that it becomes at the end of his third summer:

$Amount=P+S.I\\\\Amount=\$8100+\$364.5\\\\Amount=\$8464.5$

Hence, Option 'B' is correct.

6 0

4 years ago

Can someone please help me on this

Natali5045456 [20]

Is there anything else on the paper that can help me with that? like any questions at the top?

7 0

3 years ago

Which of the following is the function f(x) if f'(x) = *#4?

TEA [102]

Answer:

Step-by-step explanation:

To find a function's inverse, you first switch the x and y coordinates, and then solve for the new y. The same goes for finding an inverse's function. We have:

$y=\frac{x+4}{11}$ We will switch the x and y variables and then solve for the new y:

$x=\frac{y+4}{11}$ and

11x = y + 4 so

11x - 4 = y and

11x - 4 = f(x) which is choice C.

8 0

3 years ago