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lara [203]
3 years ago
11

A plumber had a pipe that was 2 yards long he cut 18 inches off the end of the pipe

Mathematics
1 answer:
balandron [24]3 years ago
7 0
To convert yards to feet, you would multiply it by 3. So, since there the pipe is 2 yards long, you could multiply 2*3 to get 6 feet. Then you can convert feet to inches by multiplying it by 12. 6*12 is equal to 72, so 2 yards is equal to 72 inches. Lastly, you can subtract 18 from 72, to get 54, and 54 inches would be your final answer.
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goblinko [34]

Answer:

10x13 is 130

130x8 is 1040

Since the door is part of the wall, but won't be painted, you subtract 1040-21 which is 1019

8 0
3 years ago
A national dental association conducted a survey to find the average (mean) amount of time dentists spend on dental fillings per
eduard

Answer:

The probability of finding a sample mean less than 18 hours is 0.0082

Step-by-step explanation:

To find the probability of finding a sample mean less than 18 hours, we need to calculate the z-score of this sample mean 18. And the probability of finding a sample mean less than 18 hours is P(z<z(18)).

Z-score can be calculated as follows:

z(18)=\frac{X-M}{\frac{s}{\sqrt{N} } } where

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  • M is the average hours dentists spend per week on fillings (20 hours)
  • s is the standard deviation (10 hours)
  • N is the sample size (144)

Putting the numbers, we get:

z(18)=\frac{18-20}{\frac{10}{\sqrt{144} } }=-2.4

Using z- table we can find that P(z<z(18)) = 0.0082

4 0
3 years ago
What is u? -u+300=200​
vodomira [7]

Answer:

100

Step-by-step explanation:

200-300= -100 But the negative of a negative is a positive so the answer is: 100.

4 0
3 years ago
Read 2 more answers
5 stars for best answer
Tatiana [17]
The answer is 22K/cubic ft
8 0
2 years ago
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7.
vodka [1.7K]

Answer:

28 ft

Step-by-step explanation:

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