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ineedhelp2285
23.08.2019 •
Mathematics
7. a population of starlings reproduces once per year. the annual geometric growth rate of the population is 4. the population had 80 individuals in 1982. how many individuals will there be in 1984? assume that starlings die after reproducing, and that individuals mature and can reproduce within a year.
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Ответ:
Step-by-step explanation:
The formula for the nth term of a geometric sequence is
aₙ = a₁rⁿ⁻¹
1. Find the general formula for the sequence
a₁ = 80
r = 4
The general formula is then
aₙ = 80(4)ⁿ⁻¹
Step 2. Find the population in 1984
You want the population at the end of the year.
However, the terms in the sequence represent the population at the beginning of the year
The end of the second year is the beginning of the third year, so you want to evaluate a₃
a₃ = 80(4)³⁻¹ = 80(4)²= 80 × 16 = 1280
Ответ:
4(3x2y4)3/(2x3y5)4
Final result :
27
—————
4x6y8
Step by step solution :
Step 1 :
Equation at the end of step 1 :
(((3•(x2))•(y4))3)
4•——————————————————
((2x3•(y5))4)
Step 2 :
Equation at the end of step 2 :
((3x2 • (y4))3)
4 • ———————————————
24x12y20
Step 3 :
33x6y12
Simplify ————————
24x12y20
Dividing exponential expressions :
3.1 x6 divided by x12 = x(6 - 12) = x(-6) = 1/x6
Dividing exponential expressions :
3.2 y12 divided by y20 = y(12 - 20) = y(-8) = 1/y8
Equation at the end of step 3 :
27
4 • ——————
16x6y8
Step 4 :
Final result :
27
—————
4x6y8