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yuradex [85]
3 years ago
11

Element X is a radioactive isotope such that every 13 years, its mass decreases by half. Given that the initial mass of a sample

of Element X is 60 grams, how much of the element would remain after 30 years, to the nearest whole number?
Mathematics
1 answer:
Nana76 [90]3 years ago
8 0

Answer:

2,325 grams !

Step-by-step explanation:

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Can somebody help me make a word problem of a inequality equation pls
CaHeK987 [17]

Answer:

sure (can i have brainliest?)

Step-by-step explanation:

6 0
3 years ago
In a random sample of 16 residents of the state of Washington, the mean waste recycled per person per day was 2.8 pounds with a
kakasveta [241]

Answer: The required confidence interval would be (2.72,2.89)

Step-by-step explanation:

Since we have given that

Mean = 2.8 pounds

Standard deviation = 0.24 pounds

n = sample size = 16

We need to find the 80% confidence interval for the mean waste.

z=1.341

So, the confidence interval will be

\bar{x}\pm z\dfrac{\sigma}{\sqrt{n}}\\\\=(2.8\pm 1.341\times \dfrac{0.24}{\sqrt{16}})\\\\=(2.8\pm 1.314\times 0.06)\\\\=(2.8-0.07884,2.8+0.07884)\\\\=(2.72116,2.87884)

Hence, the required confidence interval would be (2.72,2.89)

4 0
3 years ago
Help me with my math please!!!!
astra-53 [7]

Look up "Everything You Need To Know About Math In One Big Fat Notebook pdf." It's the best thing I've ever been given, I have it with me in math class all the time and I've aced every test. I have it with me right now and it has everything I've ever been taught about math in it so it might help you.

7 0
3 years ago
Is 6/6 more than 3/3
hodyreva [135]
They are both equivalent to 1, so they are equal. 

4 0
3 years ago
I will give Brainliest if you answer these 4 questions!!!!
masya89 [10]
Okay so
#1
4 for 5 would mean each single M&M is 1.25 (5/4)
9 for 25 would mean each single M&M is about 2.78 (25/9)
4 for 5 is the better deal

#2 
10 for 35 is 3.50 each (35/10)
12 for 40 is about 3.34 each (40/12)

#3 
85 divided by four is 21.25 meaning you'd spend about 22 cents each
the hardware store has a better deal seeing as 19 cents each is cheaper

#4
so 13 divided by 1.4 is about 9.3 so Raisin Bran has less sugar per ounce of cereal
4 0
3 years ago
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