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Travka [436]
4 years ago
7

Why do African farmers practice “slash and burn” farming?

Social Studies
1 answer:
jok3333 [9.3K]4 years ago
4 0
Because if theres alot of trees there not alot of room for crops but if you slash and burn your eliminating the trees and putting more nutrients into the soil for crop growth
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3 years ago
2.
Readme [11.4K]

Answer:

D

Explanation:

A) it is mentioned that 1 cup of water was added to each column which shows that the amount of water added to eahc column was constant, or the same

B) it is mentioned that the cylinder contained equal volumes of different sized particles, which means volume fo particles is constant as there are equal volumes

C) It is also reasonable to assume that the columns are identical as its not mentioned that they weren't, thus makking this variable constant

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3 years ago
A committee consists of eight women and twelve men. Three committee members will be chosen as officers. What is the probability
MariettaO [177]

Answer:

The probability that all the officers are women is \frac{56}{1140}

Explanation:

Given a committee consisting of 8 women and 12 men, from which 3 committee members are to be chosen as officers from a committee.  

The total number of committee members is 8 + 12 = 20 members

C(n,r) = \frac{n!}{r!(n-r)!} which represents the number of combinations of taking r objects out of n.

The probability that all the officers are women = C(8,3) / C(20,3)

= \frac{8!}{3!(8-3)!} / \frac{20!}{3!(20-3)!}

=\frac{8!}{3!5!} /\frac{20!}{3!17!}

=\frac{56}{1140}

Therefore the probability that all the officers are women is \frac{56}{1140}

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3 years ago
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