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lawyer [7]
2 years ago
15

Augusto wants to prove to his parents that watching TV while he does his homework will help him get better grades. He decides to

ask 20 of his friends if they watch
TV white they do their homework and what their grades are. He finds that his friends who have high grades also watch TV while they do their homework. He tells his
parents that he has proven that watching TV while doing homework will cause his grades to improve. What mistake has Augusto made?
O He did not use a random sample, and he tried to show cause and effect with an observational study.
O He did not use a random sample, and he tried to show cause and effect with an experiment.
O He did not separate his friends into different groups, and he didn't apply a treatment.
O He did not separate his friends into difterent groups, and he used a survey to collect data.
Mathematics
1 answer:
Soloha48 [4]2 years ago
7 0

I think had that same question
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187

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160 is what % of 40<br> plz explain
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150%

Step-by-step explanation:

this is because you can make a part to whole ratio where you have x/100 (which would symbolize the percent) and 160/40 (which would symbolize the part) then, multiply 160 by 100 to get 16000 and then divide by 40 to fulfill the x. Hope this helps!

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3 years ago
Find the modulus of the complex number 6-2i
Papessa [141]

Answer:

The modulus of the complex number 6-2i is:

|z|\:=2\sqrt{10}

Step-by-step explanation:

Given the number

6-2i

We know that

z = x + iy

where x and y are real and \sqrt{-1}=i

The modulus or absolute value of z is:

|z|\:=\sqrt{x^2+y^2}

Therefore, the modulus of 6-2i  will be:

z=6-2i

z=6+(-2)i

|z|\:=\sqrt{x^2+y^2}

|z|\:=\sqrt{6^2+\left(-2\right)^2}

    =\sqrt{6^2+2^2}

    =\sqrt{36+4}

    =\sqrt{40}

    =\sqrt{2^2}\sqrt{2\cdot \:5}

    =2\sqrt{2\cdot \:5}

   =2\sqrt{10}

Therefore, the modulus of the complex number 6-2i is:

|z|\:=2\sqrt{10}

3 0
2 years ago
Identify the factors of the quadratic equation below.
baherus [9]

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7 0
3 years ago
In Jack's class, 7 out of 25 students have hazel eyes. What percent of the class has hazel eyes?
denis23 [38]
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4 0
3 years ago
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