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netineya [11]
3 years ago
7

You are conducting a study on the health of people who have been exposed to radiation and those who have not been exposed to rad

iation. Which of these methods of obtaining data should you most likely adopt and why?
Mathematics
2 answers:
MariettaO [177]3 years ago
7 0
<span>an observational study because it involves the pre-existing condition of the subjects</span>
Nikitich [7]3 years ago
3 0

Answer:

An observational study

Step-by-step explanation:

When an observational study is done, the individuals are observed but there aren't any attempts to modify their conduct or to manipulate a variable.  There is no treatment given but the simply observation of the subjects who are selected because of certain characteristics.

In this case, an observational study should be helpful because the people have already a pre-existing condition of being exposed to radiation and therefore, the effects on their health can be studied without any new treatments or scenarios.

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Square root of 342354456​
-Dominant- [34]

Answer:

18502.8229198

3 0
2 years ago
Read 2 more answers
(e) The number of bees spotted in Amelie's garden can also be modeled by the function B(x) = 50√ k + 2x where x is the daily hig
Lunna [17]

Answer:

\frac{dB}{dt}=4

Step-by-step explanation:

Derivative indicates rate of change of dependent variable with respect to independent variables. It indicates the slope of a line that is tangent to the curve at the specific point.

Given:

Number of bees is modeled by the function B(x)=50\sqrt{k}+2x

The daily high temperature is increasing at a rate of 2 °F per day when  the number of bees spotted is 100.

To find:

rate of change of number of bees when 100 bees are spotted

Solution:

B(x)=50\sqrt{k}+2x

Differentiate with respect to t,

\frac{dB}{dt}=0+2(\frac{dx}{dt}) \\\frac{dB}{dt}=2(\frac{dx}{dt}) \\

Put (\frac{dx}{dt}) =2

\frac{dB}{dt}=2(2)=4

At x = 100, \frac{dB}{dt}=4

4 0
4 years ago
A rope is divided into three pieces. One piece is 3 inches longer than the shortest piece and 5 inches shorter than the longest
Ilia_Sergeevich [38]
<span>One piece is twenty seven inches long. The others are thirty inches, and thirty five inches. Let's say "A" is the shortest piece, and the base for the equation. The next piece is three inches longer, so we have A+3. The longest piece is five inches longer than the second, so we get A+3+5. To solve for "A" we have to simplify. A+(A+3)+(A+3+5)=3A+11. The total length is 92, so 3A+11=92. Subtract 11 from both sides to get "A" by itself: 3A+11+(-11)=92+(-11) to 3A=81. To solve divide both sides by 3: 3AĂ·3=81Ă·3 to A=27. (27)+3=30. (27)+3+5=35. To check, add the sums. 27+30+35=92 : that is a true statement.</span>
3 0
3 years ago
Read 2 more answers
Line segment AB has endpoints A(3, -7) and B(-9,-5). Find the equation of the perpendicular bisector
kupik [55]

Answer:

y = 6x + 12

Step-by-step explanation:

We require the midpoint M and slope of AB

Using the midpoint formula, then

M = [ \frac{1}{2} (3 - 9) , \frac{1}{2} (- 7 - 5) ] = (- 3, - 6 )

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = A(3, - 7) and (x₂, y₂ ) = B(- 9, - 5)

m = \frac{-5+7}{-9-3} = \frac{2}{-12} = - \frac{1}{6}

Given a line with slope m then the slope of a line perpendicular to it is

m_{perpendicular} = - \frac{1}{m} = - \frac{1}{-\frac{1}{6} } = 6

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Here m = 6 , thus

y = 6x + c ← is the partial equation

To find c substitute M(- 3, - 6) into the partial equation

- 6 = - 18 + c ⇒ c = - 6 + 18 = 12

y = 6x + 12 ← equation of perpendicular bisector

3 0
3 years ago
???????????????????????????????????????????
ArbitrLikvidat [17]
What am I finding? The area, perimeter, etc.
8 0
4 years ago
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