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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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Math-- Farmer Bill has 500 meters of fencing and wants to enclose a rectangular plot that borders on a river. If farmer Bill doe
bixtya [17]

Answer:

Required dimensions of the rectangle are L = 200 m, W  = 100 m

The  largest area that can be enclosed is 20,000 sq m.

Step-by-step explanation:

The available length of the fencing = 500 m

Now, Perimeter of a rectangle = SUM OF ALL SIDES  = 2(L+B)

But, here once side of the rectangle is NOT FENCED.

So, the required perimeter  

= Perimeter of Complete field - Boundary of 1 open side

= 2(L+ W)   - L  = 2W + L

Now, fencing is given as 500 m

⇒  2W + L  = 500

Now, to maximize the length and width:

put L = 200, W = 100

we get 2(W) +L =  2(200) + 100 = 500 m

Hence, required dimensions of the rectangle are L = 200 m, W  = 100 m

The maximized area = Length x Width

                                   = 200 m x 100  m = 20, 000 sq m

Hence, the  largest area that can be enclosed is 20,000 sq m.

6 0
3 years ago
Evaluate the expression 3.14(7)^2
ruslelena [56]

Answer:

153.86

Step-by-step explanation:

3.14(7)^2

3.14 × (7 × 7)

3.14 × 49

153.86

6 0
2 years ago
Determine the measures of the angles marked with letters​
Arturiano [62]

1) Now,

a + 27° = 90° (right angle triangle)

◆ a = 63°

2) Now,

b + b + b = 90° (right angle triangle)

or, 3b = 90°

◆ b = 30°

3) Now,

c + c + 40° = 90° (right angle triangle)

or, 2c = 90° - 40°

or, c = 50°/2

◆ c = 25°

4) Here,

◆ e = 41° (vertically opposite angle)

◆ f = 82° ( vertically opposite angle)

Now,

d + e + f = 180° (straight angle)

or, d + 41° + 82° = 180°

or, d = 180° - 123°

◆ d = 57°

Then,

◆ g = d = 57° (vertically opposite angle)

It is all correct answer...

I hope u understand...

Thank you ♥♥ my cutie...

Mark me as brainliest...

7 0
2 years ago
Plz help so i can talk to friends
viktelen [127]
9.
A quadrilateral has 4 vertices. If you add two bases, its like adding two vertices. 4+2=6. A figure that has 6 vertices is a hexagon, so the answer is hexagon.

10.
Rhombus


Good luck!
4 0
3 years ago
Read 2 more answers
My question is what is the answer for (1−2g+4h)⋅5??
DerKrebs [107]

Answer:

Simple!

Step-by-step explanation:

Multiply 5 into each term into the parenthesis.

5-`10g + 20h

6 0
3 years ago
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