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kicyunya [14]
2 years ago
14

The are adding a new room to their house. The room will be a cube with volume 6859 ft. They are going to put in hardwood​ floors

, and the contractor charges ​$5 per square foot. How much will the hardwood floors​ cost?
Mathematics
2 answers:
Sergio [31]2 years ago
6 0

Answer:

$1805 i think

Step-by-step explanation:

Cube root the volume of the room (6859) which equals 19. do 19x2=361. Do 361x5=1805. So the total would be $1805 i believe

tiny-mole [99]2 years ago
3 0

Answer:

1,371.8

Step-by-step explanation:

Here's how I got it

Since the whole square feet is 6859, and they charge 5$ per square feet, I believe if you divide 6859 divided by 5 you get 1,371.8

Sorry if I got it wrong!

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A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced.
zzz [600]

Answer:

CI=(66.54,78.46)                                  

Step-by-step explanation:

Given : A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed.

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Solution :

Let X be the yield of the batches.

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Since the size of the sample is small.

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t_{n-1,\frac{\alpha}{2}}=t_{9,0.005}

t_{n-1,\frac{\alpha}{2}}=3.250

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CI=72.5 \pm 5.96

CI=(72.5+5.96),(72.5-5.96)

CI=(66.54,78.46)

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