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3 years ago

10

In a speed race there are markers every 0.8 miles.If the course is 36 miles long,how many markers will be placed along the route

?

1 answer:

Masja [62]3 years ago

8 0

36 divided by 0.8 = 45
45 makers will be placed along the route

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Step-by-step explanation:

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What is 64÷2 then add that answer by 204

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64÷2
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3 years ago

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A maple tree in the backyard of a home has a height of 0.75 meters. How many times as tall (t) is a nearby hickory tree that is

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Since we are informed that a maple tree in the backyard of a home has a height of 0.75 meters.

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2 years ago

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3 years ago

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An agronomist wishes to estimate, to within one percentage point, the proportion of a new variety of seed that will germinate wh

Galina-37 [17]

Answer:

The minimum sample size must be 1118 to have margin of error within one percentage point.

Step-by-step explanation:

We are given the following in the question:

Germination rate = 97% = 0.97

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We have to find the minimum sample size for a 95% confidence interval.

Formula for margin of error:

$z_{stat}\times \sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

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Putting values, we get,

$1.96\times \sqrt{\dfrac{0.97(1-0.97)}{n}}\leq 0.01\\\\\sqrt{n} \geq 1.96\times \dfrac{\sqrt{0.97(1-0.97)}}{0.01}\\\\\sqrt{n}\geq 33.4350\\\Rightarrow n \geq 1117.9056$

Rounding off to integer,

$n = 1118$

Thus, the minimum sample size must be 1118 to have margin of error within one percentage point.

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3 years ago