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3 years ago

Start with 2 Rabbits.Each pair has 4 babies per month.How much will they have by the 12 month?

Mathematics

2 answers:

Andrej [43]3 years ago

8 0

2 4 8 16......

the sequence represents geometric progression with first term a = 2 and common ratio r = 2

sum of geometric progression = S = a(r^n-1)/(r-1), where n is number of terms

n =12

S = 2( 2^12 - 1)/ (2-1)

S = 8190

total rabbits by the 12 month = 8190

Vikki [24]3 years ago

4 0

2 Rabbits multiplied by 4 equals 8 multiplied by 12 equals 96.

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Step-by-step explanation:

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Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

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According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

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3 years ago