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3 years ago

Pi + pi/2 bằng bao nhiêu

Mathematics

1 answer:

ki77a [65]3 years ago

8 0

3/2pi nha má, bấm máy đi

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Garrett can order stickers from two companies. Company A charges a $30 design fee plus $0.80 per sticker. Company B charges a $1

siniylev [52]

Answer:

Garrett can order stickers from two companies. Company A charges a $30 design fee plus $0.80 per sticker. Company B charges a $14 design fee plus $1.20 per sticker. How many stickers would Garrett have to order for the cost at both companies to be the same?

Step-by-step explanation:

i got it right

8 0

3 years ago

5 times what equals 95

Scilla [17]

It would be 19 95/5=19

5 0

4 years ago

Read 2 more answers

A random sample of 64 students at a university showed an average age of 20 years and a sample standard deviation of 4 years. The

adelina 88 [10]

Answer:

The 90% confidence level is $19.15< L < 20.85$

Step-by-step explanation:

From the question we are told that

The sample size is $n = 64$

The mean age is $\= x = 20 \ years$

The standard deviation is $\sigma = 4 \ years$

Generally the degree of freedom for this data set is mathematically represented as

$df = n - 1$

substituting values

$df = 64 - 1$

$df = 63$

Given that the level of confidence is 90% the significance level is mathematically evaluated as

$\alpha = 100 - 90$

$\alpha =$ 10 %

$\alpha = 0.10$

Now $\frac{\alpha }{2} = \frac{0.10}{2} = 0.05$

Since we are considering a on tail experiment

The critical value for half of this significance level at the calculated degree of freedom is obtained from the critical value table as

$t_{df, \frac{ \alpha}{2} } = t_{63, 0.05 } = 1.669$

The margin for error is mathematically represented as

$MOE = t_{df , \frac{\alpha }{2} } * \frac{\sigma}{\sqrt{n} }$

substituting values

$MOE = 1.699 * \frac{4 }{\sqrt{64} }$

$MOE = 0.85$

he 90% confidence interval for the true average age of all students in the university is evaluated as follows

$\= x - MOE < L < \= x + E$

substituting values

$20 - 0. 85 < L < 20 + 0.85$

$19.15< L < 20.85$

4 0

3 years ago

2т - 7 = 5х +8<br> Can u help me plzzzzz

LiRa [457]

Answer:

The answer is X=5

Step-by-step explanation:

2x - 5x = 7-8

-3x = -15

X= -15: (-3)

X=5

7 0

3 years ago

Pls help... Show work

Simora [160]

Find the total number of people in Area P by adding the government sector and private sector together 422+320=742

Find the percent of people who work in the government sector by dividing the number of people who work in the government sector by the total number of people in Area P 422/742=.5687331536

Round and convert to a percent
About 57%

Hope this helps :)

8 0

3 years ago