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Afina-wow [57]
3 years ago
10

HELP PLEASE BRAINLEST FOR ANSWER Which sample is biased?

Mathematics
2 answers:
Andreyy893 years ago
7 0
C is in a good way to get your info from your email message to you as soon as I receive your message I thank you for the info I appreciate it thanks so much for sharing my prayers and prayers thank for all the hope you for your day thank you so much for your patience I keep you in the loop
Ivenika [448]3 years ago
3 0

Answer:

I think A and B are biased and C and D aren't.

Step-by-step explanation:

A and B are surveying a certain amount of people while C and D are surveying people at random

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Hello! I’m really struggling with this, any help is appreciated (:
iragen [17]

Hi, It's the 3rd option

Thanks, It was little hard to find the answer. I am not totally sure about it but as far as I understand this question. the third option is correct.

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5 0
3 years ago
What weight of dry substance is in 150g of a 3% substance solution? What weight of an 8% solution can we have with the same weig
Pavlova-9 [17]
The answers are: 4.5 g and 56.25 g respectively.

Since the first type of measurement in this question is weight or mass, I'll suppose that the percentage concentration is % mass/mass. For that type of concentration measurement, just multiply the percentage by the total mass to get the mass of the wanted material.
So 150 g * 3% = 150 g * 0.03 = 4.5g

For the 8% solution with the same amount of dry substance, use the ratio of percentages, multiplied by the mass of the first solution to get the wanted amount of new solution:
3/8 * 150 g = 56.35 g
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AURORKA [14]

Answer:

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3 0
3 years ago
Bethany is making cookies for her friend. If it takes her 15 minutes to make 3 dozen, how long will it take her to make 6 dozen
Katyanochek1 [597]
If three dozens took 15 minutes that five minutes a dozen and with six dozens it would be 30 minutes
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3 years ago
The sum of the interior angles of all polygons with 5 or more sides is exactly the same.
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