2 years ago

Please help me answer

Mathematics

1 answer:

Alla [95]2 years ago

6 0

Answer:

Step-by-step explanation:

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Carla had $40 to spend at the mall. she spent 20% of her money on lunch and 3/4 of her remaining money on a necklace. what fract

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2 years ago

Just before a referendum on a school budget, a local newspaper polls 402 voters to predict whether the budget will pass. Suppos

Sliva [168]

Answer:

21.21%

Step-by-step explanation:

Assume that proportion of support follows normal distribution.For resulting in defeat the proportion of support should less than 0.5.Given that the proportion of support is p= 0.52.

Sample size(n)= 402

We know that standard deviation is given as

$\sigma = \sqrt {\dfrac {p(1-p)}{n}}$

Now by putting the values

$\sigma = \sqrt {\dfrac{0.52\times 0.48}{402}}$

σ=0.0249

Proportion of support follows normal distribution with mean is 0.52 and standard deviation is 0.0249

We know that $Z=\dfrac{\bar{X}-\mu }{\sigma }$

$Z=\dfrac{0.5-0.52 }{0.0249}$

Z= -0.80

So P(Z<-.80) =0.2118 from standard table.

So the probability of news paper to predict defeat is 21.21%

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3 years ago

How far can a caterpillar; traveling at 0.06m/s, move in 60 seconds?

nignag [31]

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3.6 meters in 60 seconds

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2 years ago

What is the independent and dependent variable in this situation?

lord [1]

Cid Sam is a way to remember
C -control S - SAME (keep the same)

I -independent A- alter

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independent- number of downloads
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3 years ago

the ratio of boys to girls in a group is 7 to 2 if there are 65 more boys than girls work out how many boys are there

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Answer:

sHOULD BE 7:2

Step-by-step explanation:

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2 years ago