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saveliy_v [14]
3 years ago
14

20. Give an example of a controlled experiment and an observational study.

Mathematics
1 answer:
Kryger [21]3 years ago
5 0

Answer:

We do studies to gather information and draw conclusions. The type of conclusion we draw depends on the study method used:

In an observational study, we measure or survey members of a sample without trying to affect them.

In a controlled experiment, we assign people or things to groups and apply some treatment to one of the groups, while the other group does not receive the treatment.

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In a rhombus whose side measures 36 and the smaller angle is 32°, find the length of the larger diagonal, to the nearest tenth.
Anvisha [2.4K]
Given side length "a" and angle "A", calculate the diagonals<span><span>
p = square root [( 2a^2 - 2a^2 cos(A) )]
</span>q = </span><span>square root [( 2a^2+ 2a^2 cos(A) )]</span>
http://www.calculatorsoup.com/calculators/geometry-plane/rhombus.php

side = 36
cos (32) = 0.84805
p = <span>small diagonal = </span> <span> <span> <span> 19.8457652914 </span> </span> </span> <span><span> </span> </span>
q = large diagonal = <span> <span> <span> 69.2108777578 </span> </span> </span>


3 0
3 years ago
Pls help extra points and mark brainlist
igor_vitrenko [27]

Answer:

2over/a -b-c

Step-by-step explanation:

remove the parentheses

5 0
3 years ago
Does anyone know how to solve this?
Ivahew [28]

Answer:

Multiplay 30 by 5 Then multiply five-by-five then Multiply 20 by 5 Then take away your answer

7 0
3 years ago
A pair of hiking boots originally priced at $170 is on sale for 10% off. What is the sale price of the boots?
Marizza181 [45]
The sale price of the hiking boots is $153
5 0
3 years ago
Read 2 more answers
HELP PLEASEE i need it
Soloha48 [4]

Answer:

See explanation

Step-by-step explanation:

<u><em>1st photo:</em></u>

x = \sqrt{15}

\frac{x}{5} = \frac{3}{x}

x^{2} = 15

x = \sqrt{15}

<u><em>2nd photo:</em></u>

(a) GEH ~ FGH ~ FEG

<em>similar triangles, use similar corners in the right order</em>

(b) \frac{FE}{GE} = \frac{GE}{EH}   AND    \frac{FH}{GH} = \frac{GH}{HE}

<em>similar triangles, use similar sides in proportion</em>

<em />

<u><em>3rd photo:</em></u>

x = 4.5 or 4 1/2

\frac{x}{3} = \frac{3}{2}

<em>2x = 9</em>

<em>x = 4.5 or 4 1/2</em>

<em />

<u><em>4th photo:</em></u>

Length of string = 118.2 ft

<em>sin(40) = 76/x</em>

<em>x = 76/sin(40) = 118.2</em>

7 0
3 years ago
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