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3 years ago

What math problems Lisa?

Mathematics

2 answers:

luda_lava [24]3 years ago

7 0

Answer:

there is a chat you know

Step-by-step explanation:

disa [49]3 years ago

5 0

Answer:

I'm maria I'll tell Lisa to respond

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Write a decimal that is greater than 0.62% and less than 0.64%

svetlana [45]

Answer:

0.63%

Step-by-step explanation:

its literally in between the numbers

5 0

2 years ago

Read 2 more answers

What is the area of the figure to the nearest hundredth renter the answer in the box 2yd 4yd

Norma-Jean [14]

Answer:

9.57 yd squared

Step-by-step explanation:

we can divide this figure into two shapes: a rectangle and a semi-circle

since we know the length and width of the rectangle, all we ahve to do is multiply them together to find the area: 8 yd squared

for the semi-circle, we know the area is $\frac{\\\pi r^2}{2\\}$

raduis is half the diameter so 1 yd

$\frac{3.14(1)^2}{2}$

$\frac{3.14}{2}$

1.57 yd squared

lastly, add the area of the two figures together 8+1.57

3 0

2 years ago

Reduce 25\ 1000 to its lowest terms

denis-greek [22]

Answer:

The answer would be 1/40 I believe. Hope this helps :)

Step-by-step explanation:

7 0

3 years ago

In ABC, if m angle A

umka2103 [35]

Answer:

what

Step-by-step explanation:

3 0

2 years ago

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3. A new process has been developed for applying pho toresist to 125-mm silicon wafers used in manufac turing integrated circu

dlinn [17]

Answer:

The null hypothesis is $H_o : \mu = 13.4000$

The alternative hypothesis is $H_a : \mu \ne 13.4000$

The null hypothesis is rejected

The 99% confidence level is $13.3930 < \mu < 13.3994$

Step-by-step explanation:

From the question we are told that

The sample size is n = 10

The population mean is $\mu = 13.4 000 \ angstroms$

The level of significance is $\alpha = 0.05$

The sample data is

13.3987, 13.3957, 13.3902, 13.4015, 13.4001, 13.3918, 13.3965, 13.3925, 13.3946, and 13.4002

Generally the sample mean is mathematically represented as

$\= x = \frac{13.3987+ 13.3957\cdots +13.4002 }{10}$

=> $\= x = 13.3962$

Generally the sample standard deviation is mathematically represented as

$\sigma = \sqrt{\frac{\sum (x_i - \= x)^2}{n} }$

=> $\sigma = \sqrt{\frac{ (13.3987 - 13.3962)^2 + (13.3987 - 13.3962)^2 + \cdots + (13.3987 -13.4002)^2 }{10} }$

=> $\sigma =0.0039$

The null hypothesis is $H_o : \mu = 13.4000$

The alternative hypothesis is $H_a : \mu \ne 13.4000$

Generally the test statistics is mathematically represented as

$z = \frac{\= x - \mu}{\frac{\sigma}{\sqrt{n} } }$

=> $z = \frac{13.3962 - 13.4000}{\frac{0.0039}{\sqrt{10} } }$

=> $z = 3.08$

Generally the p-value is mathematically represented as

$p-value = 2P( z > 3.08)$

From the z-table $P(z > 3.08)= 0.001035$

$p-value = 2* 0.001035$

$p-value = 0.00207$

So from the obtained value we see that

$p-value < \alpha$

Hence the null hypothesis is rejected

Consider the b question

Given that the confidence level is 99% then the level of significance is

$\alpha = (100 -99)\%$

=> $\alpha = 0.01$

Generally from the normal distribution table critical value of $\frac{\alpha }{2}$ is

$Z_{\frac{\alpha }{2} } = 2.58$

Generally the margin of error is mathematically represented as

$E = Z_{\frac{\alpha }{2} } * \frac{\sigma}{\sqrt{n} }$

=> $E = 2.58 * \frac{0.0039}{\sqrt{10} }$

=> $E = 0.00318$

Generally the 99% confidence interval is mathematically represented as

$13.3962 - 0.00318 < \mu < 13.3962 + 0.00318$

=> $13.3930 < \mu < 13.3994$

7 0

3 years ago