Roger needs to buy supplies for his model airplane. He needs glue and paint, but he

Mathematics

1 answer:

OverLord2011 [107]3 years ago

7 0

Answer:

TELL HIM TO STOP BEING SO CHEAP!!!!!!!!! <3

and i oop-

Step-by-step explanation:

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En un avion viajan 120 personas de las cuales

Rzqust [24]

2/3(120) = 240/3 = 80 do not drink
4/5(120) = 480/5 = 96 do not smoke
72 do not smoke or drink

96 - 72 = 24 do not smoke
80 - 72 = 8 do not drink
72 do not do either

120 - (24 + 8 + 72) = 120 - 104 = 16 drink and smoke

4 0

4 years ago

Assume that in the absence of immigration and emigration, the growth of a country's population P(t) satisfies dP/dt = kP for som

Morgarella [4.7K]

Answer:

A) Differential equation for population growth in case of individual immigration is:

$\frac{dP}{dt}=kP+r$

B) Differential equation for population growth in case of individual emigration is:

$\frac{dP}{dt}=kP-r$

Step-by-step explanation:

Population growth rate in the absence of immigration and emigration is given as:

$\frac{dP}{dt}=kP--(1)$

A) When individuals are allowed to immigrate:

Let r be the constant rate of individual immigration given that r >0.

Differential equation for population growth in this case is:

$\frac{dP}{dt}=kP+r$

B) In case of individual emigration:

Let r be the constant rate of individual emigration given that r >0.

Differential equation for population growth in this case is:

$\frac{dP}{dt}=kP-r$

8 0

3 years ago

What numbers are a distance of 34 unit from 18 on a number line?

Digiron [165]

18 - 34 = - 16

18 + 34 = 52

If is a fraction:

$\dfrac{1}{8}-\dfrac{3}{4}=\dfrac{1}{8}-\dfrac{3\cdot2}{4\cdot2}=\dfrac{1}{8}-\dfrac{6}{8}=-\dfrac{5}{8}\\\\\dfrac{1}{8}+\dfrac{3}{4}=\dfrac{1}{8}+\dfrac{6}{8}=\dfrac{7}{8}$