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Aleonysh [2.5K]
3 years ago
11

Can any one help me with this please

Mathematics
1 answer:
patriot [66]3 years ago
3 0

Answer:

x = 19

Step-by-step explanation:

The area (A) of a trapezoid is calculated as

A = \frac{1}{2} h (b₁ + b₂ )

h is the perpendicular height and b₁ , b₂ the parallel bases

Here A = 180.5 , h = x , b₁ = 13 and b₂ = 6 , then

\frac{1}{2} x (13 + 6) = 180.5 ( multiply both sides by 2 to clear the fraction )

x × 19 = 361 ( divide both sides by 19 )

x = 19

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A sample of size 200 will be taken at random from an infinite population. given that the population proportion is 0.60, the prob
Musya8 [376]

Let p be the population proportion. <span>
We have p=0.60, n=200 and we are asked to find P(^p<0.58). </span>
The thumb of the rule is since n*p = 200*0.60 and n*(1-p)= 200*(1-0.60) = 80 are both at least greater than 5, then n is considered to be large and hence the sampling distribution of sample proportion-^p will follow the z standard normal distribution. Hence this sampling distribution will have the mean of all sample proportions- U^p = p = 0.60 and the standard deviation of all sample proportions- δ^p = √[p*(1-p)/n] = √[0.60*(1-0.60)/200] = √0.0012. 
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4 0
4 years ago
I am stuck on this! Whoever answers this question correctly gets the brainliest!
Norma-Jean [14]

Answer:

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Step-by-step explanation:

6 0
3 years ago
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8 0
3 years ago
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3 0
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