2 years ago

HELPPPPPPPPPPPP PLEASEEEEEEEEEEEEEEEEEEEEEEEEE

Mathematics

2 answers:

nadya68 [22]2 years ago

5 0

Answer: A
Explaination:

Semenov [28]2 years ago

3 0

Anger is A hope it helps :)

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A scientist has 100 milligrams of a radioactive element. The amount of radioactive element remaining after t days can be determi

grandymaker [24]

The mass of the first shipment at time t is
$m_{1}=100( \frac{1}{2} )^{ \frac{t}{10}}$

The mass of the second shipment at time t is
$m_{2}=100( \frac{1}{2} )^{ \frac{t-3}{10} }$

At time t, the ratio of m₁ to m₂ is
$\frac{m_{1}}{m_{2}} = \frac{100}{100}. \frac{(1/2)^{t/10}}{(1/2)^{(t-3)/10}} \\ = \frac{(1/2)^{t/10}}{(1/2)^{t/10}}. \frac{1}{(1/2)^{-3/10}} \\ = (1/2)^{3/10} \\ = 0.8123$

Therefore as a percentage,
$\frac{m_{1}}{m_{2}} =100*0.8123 = 81.23 \%$

Answer: B. 81.2%

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3 years ago

Which of the following groups listed below are subsets of the integers?

meriva

I believe the answer would be Whole Numbers

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2 years ago

Question help a state lottery randomly chooses 88 balls numbered from 11 through 4040 without replacement. you choose 88 numbers

cricket20 [7]

This would not be binomial; the probabilities are not independent, since the balls are drawn without replacement.

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2 years ago

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If -10 is subtracted from a number, the result is 6. what is the number?

brilliants [131]

Subtracting a negative number is the same as adding a positive number

assume your number is n

n - (-10) = 6
n + 10 = 6

subtract 10 from both sides

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3 years ago

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14x − 2y = 46

pav-90 [236]

From the second we can find:

y=7x-23

Now using this value of y in the first equation you have:

14x-2(7x-23)=46

14x-14x-46=46 which is always true meaning that there are infinitely many solutions.

Basically both equations describe the same line so every point on the line is a solution...

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3 years ago