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3 years ago

What pattern do you see 5, 10, 15, 20, 25 and 8, 16, 24, 32 and 40

Mathematics

2 answers:

Bas_tet [7]3 years ago

6 0

For the 1st pattern is adding 5 to each number. for 2nd pattern it is adding 8 to each number.

Maslowich3 years ago

3 0

For one +5, for another +8

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Am I correct on number 3? If not whats the correct answer? And what is the answer for number 4? Will be marking brainliest!!

timama [110]

Answer for number 4 is $\frac{\bold2}{\bold3}$ hour.

Step-by-step explanation:

Maximum hour spent for all homework (English homework + math homework) is 2 hours.

Let us assume the hours spent for English homework be 'e'.

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(Hours spent for math homework) = 2 × (Hours spent for English homework)

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The sticker covers 162 square cm.

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3 years ago

A bag contains 4 red marbles, 7 blue marbles, and 6 green marbles. What is the probability of choosing a blue marble when one ma

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3 years ago

Read 2 more answers

If we wanted to create a new 90% confidence interval from a different sample for the proportion of those with a two on one date

slava [35]

Answer: 271

Step-by-step explanation:

The formula we use to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

, where $z_{\alpha/2}$ is the two-tailed z-value for significance level of $(\alpha)$

p = prior estimation of the proportion

E = Margin of error.

If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2$

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2$

Given : Margin of error : E= 0.05

Confidence level = 90%

Significance level $\alpha=1-0.90=0.10$

Using z-value table , Two-tailed z-value for significance level of $0.10$

$z_{\alpha/2}=1.645$

Then, the required sample size would be :

$n=0.25(\dfrac{1.645}{0.05})^2$

Simplify,

$n=270.6025\approx271$

Hence, the required minimum sample size =271

3 0

3 years ago