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mestny [16]
3 years ago
7

Brainlist answer!!Can I get some help with this, please!!

Mathematics
1 answer:
Gemiola [76]3 years ago
4 0
A) The question would be "Does cell phone use time correlate to brain cancer?". The population is all cell phone users. The sample is the 469 people with brain cancer, and the 422 healthy people. 

B) This sample size may not portray the entire population of users because the positive results may have been fabricated by factors other than cell phone use. You would have to figure out the population size and determine the correct sample size. 

C) This study may not portray cell phone use correlation over a large population efficiently because of the sample size and the predetermined conclusion that cell phone use causes cancer. 
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Scientists say we should sleep 3/8 of a day.How about many hours is this
victus00 [196]

Answer:

9 hours

Step-by-step explanation:

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2 years ago
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Integers with different values in each digit can be expanded in a similar way. For these integers, you must use addition between
Bond [772]
Seriously nobody knows the anwser?? Im done ill just fail
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3 years ago
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Simplify the following expression. show your work.<br> (-y + 5.3) + (7.2y - 9)
Kitty [74]

Answer:

6.2y - 3.7

Step-by-step explanation:

−y+5.3+7.2y−9

Subtract 9 from 5.3 to get −3.7.

−y−3.7+7.2y

Combine −y and 7.2y to get 6.2y.

6.2y−3.7

6 0
2 years ago
Can someone please help me with this problem?? **It's high-school geometry.
jeka94

Hello!

Answer:

\huge\boxed{59.04 units}

To solve, we will need to use Right-Triangle Trigonometry:

Begin by solving for angles ∠S and ∠R using tangent (tan = opp/adj)

tan ∠S = a / (1/2b)

tan ∠S = 3√5 / 14

tan ∠S ≈ 0.479

arctan 0.479  = m∠S (inverse)

m∠S and m∠R ≈ 25.6°

Use cosine to solve for the hypotenuse, or the missing side-length:

cos ∠S = 14 / x

x · cos (25.6) = 14

x  = 14 / cos(25.6)

x ≈ 15.52

Both triangles are congruent, so we can go ahead and find the perimeter of the figure:

RS + RQ + QS = 28 + 15.52 + 15.52 = 59.04 units.

Hope this helped you! :)

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3 years ago
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I need help with a word problem. Picture is below. Please help.
mars1129 [50]
I hope this helps you


2x+pi. x

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3 years ago
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