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3 years ago

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a basketball team played five games . in those games , the team won by 7 points , lost by 3 , won by 4, lost by 2 , and won by 9

. What was the mean difference in game scores over the five games ?

1 answer:

Paul [167]3 years ago

6 0

Answer: 3

Step-by-step explanation:

7-3+4-2+9=15

15/5=3

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A breeder reactor converts uranium-238 into an isotope of plutonium-239 at a rate proportional to the amount of uranium-238 pres

topjm [15]

Let $U(t)$ denote the amount of uranium-238 in the reactor at time $t$ . As conversion to plutonium-239 occurs, the amount of uranium will decrease, so the conversion rate is negative. Because the rate is proportional to the current amount of uranium, we have

$\dfrac{\mathrm dU}{\mathrm dt}=-kU$

where $k>0$ is constant. Separating variables and integrating both sides gives

$\dfrac{\mathrm dU}U=-k\,\mathrm dt\implies\ln|U|=-kt+C\implies U=Ce^{-kt}$

Suppose we start some amount $u$ . This means that at time $t=0$ we have $U(0)=u$ , so that

$u=Ce^{-0k}\implies C=u\implies U=ue^{-kt}$

We're given that after 10 years, 99.97% of the original amount of uranium remains. This means (if $t$ is taken to be in years) for some starting amount $u$ ,

$0.9997u=ue^{-10k}\implies k=-\dfrac{\ln(0.9997)}{10}$

The half-life is the time $t_{1/2}$ it takes for the starting amount $u$ to decay to half, $0.5u$ :

$0.5u=ue^{-kt_{1/2}}\implies t_{1/2}=-\dfrac{\ln(0.5)}k=\dfrac{10\ln2}{\ln(0.9997)}$

or about 23,101 years. Notice that it doesn't matter what the actual starting amount is, the half-life is independent of that.

7 0

3 years ago

HELLLO!HELLO HELP PLIS

Solnce55 [7]

Answer:

984m

Step-by-step explanation:

so all your doing is:

41 x 24 = 984m

3 0

3 years ago

What is the value of x? Explain and show the steps.<br> 192x *4 = -5 (round to nearest tenth)

Nat2105 [25]

Answer:

0 or -5/768

Step-by-step explanation:

192x * 4 is 768x

Now you have 768x=-5

If you divide both sides by 768 you get -5/768

In decimal form that is -0.006510416

If you round the decimal to the nearest tenth you get 0

I hope this helps!

Please give brainliest if it did help

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3 years ago

Do ya'll have any suggestions about this?

Elanso [62]

Hello, I know your situation. Ask them for another chance. Ask them to forgive you and you will do your homework. Say "If this continues, then I accept full consiquinses". Make sure you ACTUALLY stick to what you say. Now, to the focusing part... Try to do ATLEAST 2 lessons for each class. (depends what school you are attending) If it seems that you are finishing too fast (less than 2 hrs), then do more homework until your homework hours fits you.

Goodluck!

God Bless you!!!

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3 years ago

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A rectangle has perimeter 92 cm and length 39 cm. What is its width?

Alik [6]

The answer:
The width is 7cm

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3 years ago

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