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katrin2010 [14]

2 years ago

12

Janine has 86 hockey cards in one book and 105 hockey cards in another book. The hockey cards come in packages of 5 cards. If Ja

nine bought all of her hockey card in packages, how many packages did she buy?

1 answer:

wel2 years ago

8 0

Answer:

ur pfp... pls get help NOWWW

Step-by-step explanation:

pls stop this madness

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The half-life of Radium-226 is 1590 years. If a sample contains 200 mg, how many mg will remain after 1000 years?

adell [148]

Answer: 129.33 g

Step-by-step explanation:

$$$Let $p=A \cdot e^{n t}$ \\$(p=$ present amount, $A=$ initial amount, $n=$ decay rate, $t=$ time)$

$\begin{aligned}&\Rightarrow \text { Given } p=\frac{A}{2} \ a t \ t=1590 \\&\Rightarrow \frac{1}{2}=e^{1590n} \Rightarrow n=\frac{\ln (1 / 2)}{1590}=-0.00043594162\end{aligned}$

$If $A=200 \mathrm{mg}$ and $t=1000$ then,$$\begin{aligned}P &=200 e^{\left(\frac{\ln \left(1/2\right)}{1590}\right) \cdot 1000} \text \\\\&=129.33 \text { grams}\end{aligned}$

3 0

2 years ago

Prove why this makes sense.

olchik [2.2K]

Answer:

it doesn't

Step-by-step explanation:

hehe, try again

6 0

3 years ago

Read 2 more answers

Which ordered pair is a solution of the equation −1/4x + 6 = y?

il63 [147K]

Answer:

C

Step-by-step explanation:

6 0

3 years ago

You will not be given credit for your answer if you do not include your equation! Your family took a trip to Florida. After the

bazaltina [42]

Answer:

80 mph

Step-by-step explanation:

720÷9=80

hope this helps!!!

3 0

3 years ago

you have a 20 ounce bottle of juice. you pour out 1/4 of the bottle to share with a friend. if your our out 3 ounces for yoursel

seropon [69]

12 ounces will be left in the bottle

Turn the 1/4 into a decimal which is 0.25 and times that by 20 and you’ll get 5, 5 is the amount of ounces you poured for your friend. Subtract 20 ounces by 5 ounces and you’ll get 15 ounces, then subtract 15 by 3 which is the amount of juice you poured for yourself and you’ll be left with 12 ounces in the bottle.

5 0

3 years ago