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Sidana [21]
3 years ago
14

A window washer cleaned 28 windows in 4 hours. At this rate, how many windows did he clean in 9 hours?

Mathematics
1 answer:
myrzilka [38]3 years ago
8 0

Answer:

63

Step-by-step explanation:

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Calculate the quotient below and give your answer in scientific notation.<br> 2.64*10^-3\8.0*10^0
Zolol [24]

Answer:

The quotient of: \frac{2.64\cdot 10^{-3}}{8.0\cdot 10^0} is: \mathbf{3.3\times 10^{-4}}

Step-by-step explanation:

We need to find quotient of: \frac{2.64\cdot 10^{-3}}{8.0\cdot 10^0}

We know that 10^0=1

Now solving:

\frac{2.64\cdot 10^{-3}}{8.0\cdot 10^0}\\=\frac{2.64\cdot 10^{-3}}{8.0}\\=\frac{0.00264}{8}\\=0.00033

Writing it in scientific notation

0.00033\\=3.3\times10^{-4}

So, the quotient of: \frac{2.64\cdot 10^{-3}}{8.0\cdot 10^0} is: \mathbf{3.3\times 10^{-4}}

3 0
3 years ago
Find 1/2 of 5 less than 10
igor_vitrenko [27]
One half of 5 less than 10 =
(10 - 5)/2
5/2 = 2.5
So, the answer is 2.5

5 0
3 years ago
Read 2 more answers
A botanist collected one leaf at random from each of 10 randomly selected mature maple trees of the same species. The mean and t
Zarrin [17]

Answer:

One sample t-test for population mean would be the most appropriate method.

Step-by-step explanation:

Following is the data which botanist collected and can use:

  • Sample mean
  • Sample Standard Deviation
  • Sample size (Which is 10)
  • Distribution is normal

We have to find the best approach to construct the confidence interval for one-sample population mean. Two tests are used for constructing the confidence interval for one-sample population mean. These are:

  • One-sample z test for population mean
  • One-sample t test for population mean

One sample z test is used when the distribution is normal and the population standard deviation is known to us. One sample t test is used when the distribution is normal, population standard deviation is unknown and sample standard deviation is known.

Considering the data botanist collected, One-sample t test would be the most appropriate method as we have all the required data for this test. Using any other test will result in flawed intervals and hence flawed conclusions.

Therefore, One-sample t-test for population mean would be the most appropriate method.

8 0
3 years ago
Help me please I beg of you
Degger [83]

Answer:

134/67*100=50%

ez ....

4 0
2 years ago
Christine bought 124 inches of red ribbon . she wants to make bows for a party . each now requires 5 inches of ribbon . How many
Minchanka [31]
The answer would be 24 because 124 divided by 5 is 24.8 but if you round it out of all the inches of red ribbon she can make 24
7 0
2 years ago
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