You are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to radiation. Which of these methods of obtaining data should you most likely adopt and why?

Answers

Answer 1

Answer: The method of obtaining data that should be used in the current situation is : an experimental study because it involved the pre-existing condition of the subject.
With this, you can compared the data of the pre-existing and existing condition to make a conclusion

hope this helps

Answer 2

Answer:

It is A) Observational Study

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Point D(−1, 5) is reflected across the x-axis.Which statements about D' are true?Select each correct answer.The y-coordinate is−5.The x-coordinate is −1.The y-coordinate is 5.The x-coordinate is 1.

If a smoothie recipe calls for 8 pints of mango juice but only 10 cups of mango juice are available, what is the scaling factor the other ingredients in the recipe need to be multiplied by?

Answers

The amount of recipes is 6

1.25 if you are increasing the amount 0.8 if you are decreasing.

What is the solution to this system of linear equations?y − 4x = 7

2y + 4x = 2

(3, 1)
(1, 3)
(3, −1)
(−1, 3)

Answers

This can be determined by method of system of linear equation. Therefore, the correct option is D i.e. (-1,3) where, x= -1 and y = 3.

Given :

$y - 4x = 7$ ...(1)

$2y + 4x = 2$ ...(2)

To obtain the value of x and y,

From equation (1) find the value of y

$y=7+4x$ ...(3)

put this value in (2) and solve it further,

$\begin{aligned}2y+4x&=2\n2(7+4x)+4x&=2\n14+8x+4x&=2\n12x&=-12\nx&=-1\end{aligned}$ ...(4)

Put the value of x=-1 in equation (3),

Thus we get,

, $y=7+4(-1)\ny=7-4\ny=3$

Therefore, the correct option is D i.e. (-1,3) where, x= -1 and y = 3.

For further details, please prefer this link:

brainly.com/question/13631560

Good morning Sonny

y-4x=7

2y+4x=2

We need to solve -4x+y=7 for y

Now let's start by adding 4x to both sides

-4x+y+4x=7+4x

y=4x+7

Now substitute 4x+7 for y in 4x+2y=2 so we can find the value for x

4x+2y=2

4x+2(4x+7)=2

12x+14=2

Add -14 to both sides

12x=14-14=2-14

12x=-12

Now divide 12 to both sides so we can find x

12x/12=-12/12

x=-1

Now we need to find the value for y by substitute -1 for x in y=4x+7

y=4x+7

y=(4)(-1)+7

y=3

Work done ;)

Answer : x=-1 and y=3

(-1,3)

I hope that's help :0

Mary has saved $17.50 in the past 3 weeks. At this rate how much will she save in 15 weeks

Answers

Answer:

$87.50

Step-by-step explanation:

With this amount of detail we can see that she has saved 17.5 in 3 weeks. We need to find how much in 15 weeks so we...

15/3=5

17.5*5=87.50

The equation of the parabola whose focus is at (0, 5) and directrix at y = -5 is:~ y = (1/20)x²
~ y = -(1/20)x²
~ x = (1/20)y²

Answers

The equation of parabola will be y=(1/20)x² .

Given,

Focus : (0, 5)

Directrix : y = -5

Now,

The standard equation of parabola is : x² = 4ay or y² = 4ax .

Focus is above directrix, it opens up

x²=4ay

a is distance from directrix to vertex

Since it opens up, a is positive

from -5 to 0 is 5 units

x²=4(5)y

x²=20y

solve for y

divide both sides by 20

y=(1/20)x²

Know more about parabola,

brainly.com/question/11911877

#SPJ2

for a parabola at vertex (0,0)
we see that we have to go up and down
therfor it opens up or down

since focus is above directix, it opens up
x^2=4Py
p is distance from directix to vertex
since it opens up, P is positive
from -5 to 0 is 5 units
x^2=4(5)y
x^2=20y
solve for y
divide both sides by 20
y=(1/20)x^2

first one

If a regular polygon has 16 sides, how many lines of symmetry can it possibly have?

Answers

Answer:

The possible line of symmetry that a regular polygon of side 16 has is:

Step-by-step explanation:

The relationship that holds between the number of line of symmetry and the number of sides in a regular polygon is:

Number of lines of symmetry in a regular polygon is equal to the number of sides of the regular polygon.

Here we are given that a regular polygon has 16 sides.

This means that the number of line of symmetry in this given regular polygon is:

16 lines of symmetry. Hope this helps! - Apex

What is the geometric mean of 3and 6

Answers

Answer:

The mean is 4.5

Step-by-step explanation:

u add the numbers and divide by how many numbers there are

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