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2 years ago

15

Which ordered pair represents a point that is a solution of the equation y = −1/2x and therefore, lies on the graph of this func

tion?
note: time4learning

1 answer:

jasenka [17]2 years ago

5 0

Answer:

is there a graph that needs to go with it?

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Which of the following points lie in the solution set to the following system of inequalities? y > −3x + 3 y > x + 2

OverLord2011 [107]

Answer:

y> -3x

3

y > x +2

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3 years ago

An amtrak train travels at a speed of 125 miles per hour convert the speed into minutes/9611920/582d421e?utm_source=registration

Leona [35]

125 MPH = 125/60 MP(Minute) because 1 Hour = 60 Minutes
= 2.0833...Miles per minute

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3 years ago

The amount A of the radioactive element radium in a sample decays at a rate proportional to the amount of radium present. Given

slavikrds [6]

Answer:

a) $\frac{dm}{dt} = -k\cdot m$ , b) $m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ , c) $m(t) = 10\cdot e^{-\frac{t}{2438.155} }$ , d) $m(300) \approx 8.842\,g$

Step-by-step explanation:

a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

$\frac{dm}{dt} = -k\cdot m$

b) The general solution is found after separating variables and integrating each sides:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

Where $\tau$ is the time constant and $k = \frac{1}{\tau}$

c) The time constant is:

$\tau = \frac{1690\,yr}{\ln 2}$

$\tau = 2438.155\,yr$

The particular solution of the differential equation is:

$m(t) = 10\cdot e^{-\frac{t}{2438.155} }$

d) The amount of radium after 300 years is:

$m(300) \approx 8.842\,g$

4 0

3 years ago

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Please help! Will mark brainliest if correct! Worth 20 points!

Drupady [299]

The answer is 14.8 so C.

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3 years ago

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How do u multiply 3 by 3 digits

kobusy [5.1K]

Do you mean 3 to the third power or three times three? Three to the third power would be three times three times three which is 27. But just three times three is 9

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3 years ago

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