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2 years ago

Please help me! this got deleted at first for some reason

Mathematics

2 answers:

Brut [27]2 years ago

5 0

55 square inches!!! I hope that the right answer ? But yea uh good luck lol

Dmitrij [34]2 years ago

3 0

Answer: 55 Square inches

Step-by-step explanation:

You should find the area of the square and rectangle separately

To find the area you multiply length times width, so the area of the square is 4×4 which equals 16

Then you do the same to the rectangle, 13×3=39

To find the area of the whole figure you add the area of the two shapes together 16+39 which should give you 55

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2 years ago

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2 years ago

800 hundred 2 hundred standord form

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2 years ago

Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a

Brums [2.3K]

Answer:

The minimum sample size is $n =135$

Step-by-step explanation:

From the question we are told that

The confidence interval is $( lower \ limit = \ 0.44,\ \ \ upper \ limit = \ 0.51)$

The margin of error is $E = 0.1$

Generally the sample proportion can be mathematically evaluated as

$\r p = \frac{ upper \ limit + lower \ limit }{2}$

$\r p = \frac{ 0.51 + 0.44}{2}$

$\r p = 0.475$

Given that the confidence level is 98% then the level of significance can be mathematically evaluated as

$\alpha = 100 - 98$

$\alpha = 2\%$

$\alpha =0.02$

Next we obtain the critical value of $\frac{\alpha }{2}$ from the normal distribution table

The value is

$Z_{\frac{\alpha }{2} } = 2.33$

Generally the minimum sample size is evaluated as

$n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )$

$n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )$

$n =135$

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3 years ago

Jose will travel 268 km with his family this weekend. How many miles will he travel? Round to the nearest hundredth.

Vinil7 [7]

I think its 200 as if you convert to miles it's 166.527 and rounded to nearest hundredth is 200

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3 years ago

Please help me! this got deleted at first for some reason ​

Please help me! this got deleted at first for some reason