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laila [671]
3 years ago
10

While observing slides under a microscope, Jack adjusts the microscope's mirror so that a circle of light can be seen. Which mic

roscope is in use?
A.
Compound microscope
B.
Electron microscope
C.
Scanning electron microscope
Biology
1 answer:
Lelu [443]3 years ago
8 0

Answer: A compound or light microscope

Explanation:

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A bird species in danger of extinction has a population that is decreasing exponentially left parenthesis upper a equals upper a
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Answer:

This will happen in 39 years.

Explanation:

The population of the birds varies as A = A.e^kt

The population of birds fell from 1400 from 1000

Time it will take for the population to fall below 100 = x years.

when t = 0, population = 1400

t= 3; Population = 1000

Therefore:

1400 = 1000e^5k

e^5k= 1400/1000

k= (In 1.4)/5

we need to find x, such that

1400/1000= (e^xk)

14=(e^xk)

In(14) =kx

x= 5In(14)/In(1.4)

x= 39 years

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