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Vladimir79 [104]

3 years ago

8

We want to know how to solve this math problem.Frannie puts 2/3 of her music collection on a MP3 player.While on vacation she li

stened to 3/5 of the music on the player.How much of Frannie’s music collection did she listen to while on vacation?

1 answer:

Softa [21]3 years ago

5 0

Frannie lisend to 6/15

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Suppose a population of rodents satisfies the differential equation dP 2 kP dt = . Initially there are P (0 2 ) = rodents, and t

WINSTONCH [101]

Answer:

Suppose a population of rodents satisfies the differential equation dP 2 kP dt = . Initially there are P (0 2 ) = rodents, and their number is increasing at the rate of 1 dP dt = rodent per month when there are P = 10 rodents.

How long will it take for this population to grow to a hundred rodents? To a thousand rodents?

Step-by-step explanation:

Use the initial condition when dp/dt = 1, p = 10 to get k;

$\frac{dp}{dt} =kp^2\\\\1=k(10)^2\\\\k=\frac{1}{100}$

Seperate the differential equation and solve for the constant C.

$\frac{dp}{p^2}=kdt\\\\-\frac{1}{p}=kt+C\\\\\frac{1}{p}=-kt+C\\\\p=-\frac{1}{kt+C} \\\\2=-\frac{1}{0+C}\\\\-\frac{1}{2}=C\\\\p(t)=-\frac{1}{\frac{t}{100}-\frac{1}{2} }\\\\p(t)=-\frac{1}{\frac{2t-100}{200} }\\\\-\frac{200}{2t-100}$

You have 100 rodents when:

$100=-\frac{200}{2t-100} \\\\2t-100=-\frac{200}{100} \\\\2t=98\\\\t=49\ months$

You have 1000 rodents when:

$1000=-\frac{200}{2t-100} \\\\2t-100=-\frac{200}{1000} \\\\2t=99.8\\\\t=49.9\ months$

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3 years ago

$250 at 4 percent for 1 year

Jet001 [13]

Answer:

the answer is 10

Step-by-step explanation:

4% of 250 is 10 and also can you help me with my problem?

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Question 3 of 10

7nadin3 [17]

Answer:

F

Step-by-step explanation:

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3 years ago

A bag contains 26 tiles, each with a different letter of the alphabet written on it. You choose 3 tiles from the bag without loo

blagie [28]

Answer:

1/26

Step-by-step explanation:

Total no. of tiles = 26

In each tile , a different alphabet is written.

And we need 3 tiles (in which A , B & C are written in it) in one try.

So the probability of choosing tiles with letters A , B & C ( in one try ) = 1/26

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3 years ago

Need help fast thanks

Katena32 [7]

Answer:

Have no idea..

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