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2 years ago

A window washer cleaned 38 windows in 2 hours. At this rate, how many windows did he clean in 7 hours?

Mathematics

2 answers:

andriy [413]2 years ago

6 0

Answer:

Step-by-step explanation:

38/2=19x7=133

Kryger [21]2 years ago

3 0

Answer:

I believe its 19 times 7 which is 133. I did this in my head so correct me if im wrong lol.

Step-by-step explanation:

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What is the median for the set of data shown

klemol [59]

Answer: OPTION C

Step-by-step explanation:

By definition, the median is the middle number in the set.

Therefore, keeping the definition above on mind, to solve this problem the numbers must be arranged from least to greastest. In the figure shown in the problem, you can see that they are already arranged in this order. Therefore, the middle number in the set is:

14, 28, 33, 42, 53, 81, 97

Then, you can conclude that the median is: 42.

Therefore, the answer is the Option C.

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2 years ago

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A sample is selected from a population with μ = 46, and a treatment is administered to the sample. After treatment, the sample m

Georgia [21]

Answer:

0.5

Step-by-step explanation:

Solution:-

- The sample mean before treatment, μ1 = 46

- The sample mean after treatment, μ2 = 48

- The sample standard deviation σ = √16 = 4

- For the independent samples T-test, Cohen's d is determined by calculating the mean difference between your two groups, and then dividing the result by the pooled standard deviation.

Cohen's d = $\frac{u2 - u1}{sd_p_o_o_l_e_d}$

- Where, the pooled standard deviation (sd_pooled) is calculated using the formula:

$sd_p_o_o_l_e_d =\sqrt{\frac{SD_1^2 +SD_2^2}{2} }$

- Assuming that population standard deviation and sample standard deviation are same:

SD_1 = SD_2 = σ = 4

- Then,

$sd_p_o_o_l_e_d =\sqrt{\frac{4^2 +4^2}{2} } = 4$

- The cohen's d can now be evaliated:

Cohen's d = $\frac{48 - 46}{4} = 0.5$

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2 years ago

What is 287 divided by 68 estimated

grin007 [14]

When you divide 287 by 68, when it is not rounded, you will get 4.22058823529... (repeated decimal), but when you round it, you can either get the following: 4.22, 4.2, or 4 (choose which ever you want to pick out of these rounded forms.)

Hope this helped!

Nate

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2 years ago

Please help What is the value of x? A:12 B:15 C: 6 D: 30

pickupchik [31]

Answer: A, 12

Step-by-step explanation:

The line in the middle is a midsegment, making the two triangles similar by a ratio of two. So, dividing 60 by five will give you twelve

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3 years ago

2/5 + 1/3= in Simplest form

expeople1 [14]

Thye have to have like denominators.

So it becomes, 6/15+5/15 which is equal to 11/15

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3 years ago

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