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anastassius [24]
3 years ago
9

Frank bought 349 acres of land for a housing development. If 16 acres of his purchase is reserved for a community center, how ma

ny three-acre building lots are available for sale?
Mathematics
1 answer:
Gelneren [198K]3 years ago
6 0
First we will subtract 16 acres from total land 349 acres.
349-16=333 acres

Now divide 333 by 3
Answer will be 111 lots of 3 acres.
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Assume that trees are subjected to different levels of carbon dioxide atmosphere with 7% of the trees in a minimal growth condit
taurus [48]

Answer: The mean and standard deviation are 567.2 and 89.88 resp.

Step-by-step explanation:

Since we have given that

For 370 parts per million = 7% = 0.07

For 440 parts per million = 10% = 0.10

For 550 parts per million = 49% = 0.49

For 670 parts per million = 34% = 0.34

So, Mean of the carbon dioxide atmosphere for these trees would be

E[x]=370\times 0.07+440\times 0.1+550\times 0.49+670\times 0.34=567.2

And

E[x^2]=370^2\times 0.07+440^2\times 0.1+550^2\times 0.49+670^2\times 0.34=329794

So, Variance would be

Var\ x=E[x^2]-E[x]^2=329794-567.2^2=8078.16

So, the standard deviation would be

\sigma=\sqrt{8078.16}=89.88

Hence, the mean and standard deviation are 567.2 and 89.88 resp.

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5. A square pyramid has a slant height of 5 meters. The perimeter of the base is 32 meters. Find the surface area of the pyramid
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Step-by-step explanation:

Answer to A square-based pyramid has a slant height of 10 meters and a side base of 16 meters. What is the surface area? by Janet Heberling https://www.quora.com/A-square-based-pyramid-has-a-slant-height-of-10-meters-and-a-side-base-of-16-meters-What-is-the-surface-area/answer/Janet-Heberling-1?ch=15&oid=253187394&share=f14a7431&srid=hdLI1f&target_type=answer

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Answer:

15 km/h

Step-by-step explanation:

To find the speed, divide the total number of kilometers by the total number of hours:

Find the total number of hours:

32 + 13

= 45

Divide this by 3:

45/3

= 15

So, the average speed was 15 km/h

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3 years ago
If 2 /10 = 1/5, how many fifths must be added together to make 6/10 ­?
Kobotan [32]

Answer:

3, fifths should be added.

2/10 = 1/5

4/10 = 2/5

6/10 = 3/5

Divide the tenth fractions by two, to get the anwser on the right.

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2 years ago
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