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Fed [463]
2 years ago
5

A scale model of a rectangular building lot measures 7feet by 5 feet. If the actual house will be built using a scale factor of

12 what is the area of the actual building lot
Mathematics
1 answer:
Tamiku [17]2 years ago
5 0
Actual area of the rectangular building = 5040 feet²
Step-by-step explanation:
Length of the rectangular building = 7 feet
Width of the rectangular building = 5 feet
Now, The building is made with a scale factor of 12
So, Actual length of the rectangular building = 84 feet
Actual width of the rectangular building = 60 feet
Now, Actual area of the rectangular building = Length × Width
⇒ Actual area of the rectangular building = 84 × 60
⇒ Actual area of the rectangular building = 5040 feet²
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g A zoologist spots what might be a rare subspecies of beetle, due to the pattern on its back. In the rare subspecies, 98% have
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Given that a beetle has the pattern, 0.098 is the probability that it belongs to the rare subspecies

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You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli
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Answer:

We need to sample at least 1069 parents.

Step-by-step explanation:

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Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

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Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

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How many parents do you have to sample?

We need to sample at least n parents.

n is found when M = 4, \sigma = 79.5. So

M = z*\frac{\sigma}{\sqrt{n}}

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4\sqrt{n} = 1.645*79.5

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Rounding up

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