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svlad2 [7]
3 years ago
8

A researcher is running a study to determine how employees of a certain company commute to work. In order to complete the study,

the researcher selects a sample of 300 employees of this company and records their means of arrival on a specified day.
If the researcher also wants to consider the age of the employee as an additional factor in this study, what would this be considered?

a) Matching

b) Placebo Effect

c) Blocking

d) Stratifying

e) Control
Mathematics
1 answer:
storchak [24]3 years ago
4 0

Answer:

Placebo Effect would be considered.

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What is the length of BD?
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From -6 to positive 1 the length is 7

Step-by-step explanation:

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2 years ago
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What is the sum of the first thirteen terms in a geometric series with a<br> r = 3 a1= -10
Ipatiy [6.2K]

To calculate the sum of the first thirteen terms of the geometric series, we use the formula below.

Formula:

  • S₁₃ = a(rⁿ-1)/(r-1).............. Equation 1

Where:

  • S₁₃ = Sum of the first thirteen terms of the geometric series.
  • a = First term of the series
  • r = Common ratio

Given:

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  • r = 3
  • n = 13

Substitute these values into equation 1

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7 0
2 years ago
danielle wants to know how fast her rose garden will grow. Right now, her roses are 3 3/8 inches tall. If her roses grow 5/8 of
KATRIN_1 [288]

Answer:  The answer is minimum 33 days.

 

Step-by-step explanation:  Given that Daniel has a beautiful rose garden and she wants to know how fast her rose garden will grow. Also given that

Height of her roses at present is given by

h_p=3\dfrac{3}{8}=\dfrac{27}{8}~\textup{inches}.

And, height of the roses that increases each day is

h_d=\dfrac{5}{8}~\textup{inches}.

We need to find the number of days in which her roses will be a height of minimum 24 inches.

Let, 'x' be the number of days taken by the roses to be minimum 24 inches tall.

So, we have

h_p+h_dx\geq 24\\\\\Rightarrow \dfrac{27}{8}+\dfrac{5}{8}x\geq 24\\\\\Rightarrow 27+5x\geq 192\\\\\Rightarrow 5x\geq 165\\\\\Rightarrow x\geq 33.

Thus, the roses will take minimum of 33 gays attain a height of no less than 24 inches.



3 0
3 years ago
I need help with this:)
elena55 [62]
First, find the area of the triangle. The height is 9 and the base is 33. So, multiply the base times height, which is 297. Now, divide 297 by 2. This equals 148.5. Secondly, find the area of the rectangle. Multiply the length times the width. 38•20= 760. Now, add the areas of the two shapes. 148.5+760= 908.5. So, 908.5 is your final answer. :) 
Hope this helps! 
5 0
3 years ago
Complete the table to find the indefinite integral. (Use C for the constant of integration.)
ElenaW [278]

Step-by-step explanation:

Note the expression below can be rewritten as

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Therefore, the we can rewrite the integral as

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4 0
2 years ago
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