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k0ka [10]
3 years ago
12

The growth of a bug population shows a geometric sequence as shown in the table. This pattern continues indefinitely. What will

the population be on Week 20?
♦about 1,496,366
♦about 997,577
♦about 665,051
♦about 464,758

Mathematics
2 answers:
Nonamiya [84]3 years ago
3 0
The common ratio is,
r= 450/300 = 3/2


nth term of geometric series is given by,
a_{n} = a₁r^{n-1}
a₂₀ = 300(3/2)¹⁹ = 665051
Svetlanka [38]3 years ago
3 0

Answer:

the population be on Week 20 is about 665,051

Step-by-step explanation:

The growth of a bug population shows a geometric sequence as shown in the table

For all geometric sequence , there should be a common ratio

Lets find common ratio 'r'

To find common ratio we divide second term by first term

so common ratio r= \frac{450}{300} =\frac{3}{2}

To find nth term of geometric sequence , formula is

a_n = a_1(r)^{n-1}

Where a1 is the first term  and r is the common difference

a1= 300 and r= 3/2

We need to find the population on Week 20, so n= 20

We plug in all the values and find out a20

a_{20} = 300(\frac{3}{2})^{20-1}

a_{20} = 300(\frac{3}{2})^{19}=300*2216.83782=665051.346

the population be on Week 20 is about 665,051

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