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Vesnalui [34]
3 years ago
10

A graduate student in agriculture is interested to see how different types of soil will affect the cellulose structure of a cert

ain kind of plant. In the lab, she prepares 8 blocks of soil each with different properties and plants 20 seeds of the plant in each block. After 4 weeks, when the plants are grown enough, she randomly selects 5 plants in each soil type and examines their cellulose structure. What type of sampling did this graduate student use?
a. Simple Random Sample
b. Stratified Sampling
c. Cluster Sampling
d. Convenience Sampling
Mathematics
1 answer:
timofeeve [1]3 years ago
8 0
Answer is: D

by the way, do not open or click that link. its a virus
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20x+20-4-15x=96-32 solution??
svetoff [14.1K]

<em>20x</em>+20-4<em>-15x</em>=96-32

(next:subtract 96-32)

<em>20x</em>+20-4<em>-15x</em>=64

(next: then combine like terms)

<em>5x</em>+16=64

(next: subtract 16 from 64)

<em>5x</em>=48

(next: divide 48/5)

<em>x=9.6</em>


8 0
3 years ago
Read 2 more answers
The Value of Expression B is eight times the value of Expression A Without evaluating Expression A, Determine what number belong
Tcecarenko [31]
Unknown: X

Expression B = 8 Expression A
X×[(1.5+100.25)x3.65]=8 {<span>4×[(1.5+100.25)x3.65]}
</span>X×[(1.5+100.25)x3.65]=32×[(1.5+100.25)x3.65]

Comparing the two expressions, X=32

Answer: The <span>number belongs in the box in Expression B is 32</span>
4 0
4 years ago
HELP ME PLEASEEE I CANT DO IT ANYMORE
olasank [31]

Answer:

Yes

Step-by-step explanation:

We can add 20 to both sides and get 120=4v. Divide both sides by 4 and find that 30=v. Therefore, Lance is correct.

6 0
2 years ago
7th grade math help me pleaseeee
Harman [31]

Answer:

a)b=4

b)x=-9

c)r=6

Step-by-step explanation:

Question 2.

a)5b+6=26

5b=26-6

5b=20

b=4

b)6-x=15

-x=15-6

-x=9

x=-9

c)r/2+2=5

r/2=5-2

r/2=3

Multiply both sides by 2 to remain with r

r/2×2=3×2

r=6.

7 0
3 years ago
Can anyone help??? I’m stuck
sukhopar [10]

Answer:

C)

Step-by-step explanation:

If you take a look at each of the divided lines, 4 out of the 5 segments are filled, representing 4/5. Since there are 6 of lines, the answer is 6\times \dfrac{4}{5}, or choice C. Hope this helps!

4 0
3 years ago
Read 2 more answers
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