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3 years ago

14

You get in an elevator and go down 8 floors. You exit on the 16th floor. Write and solve an equation to find what floor you got

on the elevator.

1 answer:

disa [49]3 years ago

3 0

So floor that you started is x
go down 8 means -8
end on 16

so
x-8=16
add 8
x=24

started on 24

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Answer:

The insect population after 6 days is of 1639 insects.

Step-by-step explanation:

A population of insects increases at a rate 230 + 8t + 0.9t2 insects per day

This means that $r(t) = 230 + 8t + 0.9t^2$

The population of insects after x days is given by:

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So

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$P(x) = 230t + 4t^2 + 0.3t^3 + K|_{0}^{x}$

$P(x) = 230x + 4x^2 + 0.3x^3 + K$

In which K is the initital population(which is 50). So

$P(x) = 230x + 4x^2 + 0.3x^3 + 50$

After 6 days:

$P(6) = 230*6 + 4*6^2 + 0.3*6^3 + 50 = 1638.8$

Rounding to the nearest insect, 1639

The insect population after 6 days is of 1639 insects.

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