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3 years ago

What number has a digit 9 that is 10 times the value of the digit 9 in 0.79. Need help now

Mathematics

1 answer:

Arlecino [84]3 years ago

5 0

Answer:

0.9 or 7.9

Step-by-step explanation:

Mark brainliest please

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HELP ME WITH THIS PLEASEEE !

marin [14]

Answer:

34 i think i got it really wrong but...

Step-by-step explanation:

8 0

3 years ago

Perform the indicated operation -3+14= ?

Zigmanuir [339]

The answer is -3+14=11

5 0

4 years ago

for the data values below construct a 95 confidence interval if the sample mean is known to be 12898 and the standard deviation

Volgvan

Answer:

A 95% confidence interval for the population mean is [3315.13, 22480.87] .

Step-by-step explanation:

We are given that for quality control purposes, we collect a sample of 200 items and find 24 defective items.

Firstly, the pivotal quantity for finding the confidence interval for the population mean is given by;

P.Q. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample proportion of defective items = 12,898

s = sample standard deviation = 7,719

n = sample size = 5

$\mu$ = population mean

Here for constructing a 95% confidence interval we have used a One-sample t-test statistics as we don't know about population standard deviation.

So, 95% confidence interval for the population mean, $\mu$ is ;

P(-2.776 < $t_4$ < 2.776) = 0.95 {As the critical value of t at 4 degrees of

freedom are -2.776 & 2.776 with P = 2.5%}

P(-2.776 < $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ < 2.776) = 0.95

P( $-2.776 \times {\frac{s}{\sqrt{n} } }$ < ${\bar X-\mu}$ < $2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

P( $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ < $\mu$ < $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ) = 0.95

95% confidence interval for $\mu$ = [ $\bar X-2.776 \times {\frac{s}{\sqrt{n} } }$ , $\bar X+2.776 \times {\frac{s}{\sqrt{n} } }$ ]

= [ $12,898-2.776 \times {\frac{7,719}{\sqrt{5} } }$ , $12,898+2.776 \times {\frac{7,719}{\sqrt{5} } }$ ]

= [3315.13, 22480.87]

Therefore, a 95% confidence interval for the population mean is [3315.13, 22480.87] .

5 0

3 years ago

Let f(x)=4x-7 and g(x)-5+9x. what are f+g and f-g? what are their domains?

cluponka [151]

The answer is 13x-12 f-g is -5x-2 and the domains are all real numbers i believe the multiply is $36x^{2} -83x-35$ and divide i'm not sure sorry hope the rest helps though':p

7 0

3 years ago

Pls tell me how to do it.

kkurt [141]

Lets get started :)

The ratio of juice is as follows:
orange : mango : apple
3 : 5 : 4
↑
35 bottles

5x = 35

$\frac{5x}{5} = \frac{35}{5}$
5 and 5 cancels out
x = 7

3x + 5x + 4x = total
Subsitute the value you go for x, x = 7
3(7) + 5(7) + 4(7) = total
21 + 35 + 28 = 84

Total of 84 bottles of juices :)
Your final answer will be option D

6 0

3 years ago