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2 years ago

14

Helppp what’s the answer

1 answer:

jarptica [38.1K]2 years ago

7 0

Answer:

It is the 3rd option (going from left to right)

Step-by-step explanation:

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Write a fraction as a mixed number 20/10

Anna11 [10]

To get 20/10 as a mixed number you would have to take 20 and divide it by 10. Once you do that your answer should be 2.

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2 years ago

A sample of Iron-59 contains 50 mg. One hundred days later, the sample contains 10.75 mg. What is the half-life of iron-59, in d

exis [7]

Answer:

$t_{1/2}=45.09 d$

Step-by-step explanation:

We can use the decay equation:

$M=M_{0}e^{-\lambda t}$

M(0) is the initial mass
M is the mass after t (1000 days) time
λ is the decay constant

But:

$\lambda = ln(2)/t_{1/2}$

t(1/2) is the half-life.

So, we can rewrite the initial equation:

$M=M_{0}e^{-\frac{ln(2)}{t_{1/2}}t}$

Now, we just need to solve it for t(1/2):

$ln(\frac{M}{M_{0}})=-\frac{ln(2)}{t_{1/2}}t$

$t_{1/2}=-\frac{ln(2)}{ln(\frac{M}{M_{0}})}t$

$t_{1/2}=-\frac{ln(2)}{ln(\frac{10.75}{50})}100$

$t_{1/2}=45.09 d$

I hope it helps you!

5 0

2 years ago

Angles X and Y form a straight line. Angles W and Z form a straight line. Angles X and W are beside each other. Angles Y and Z a

joja [24]

Step-by-step explanation:

∠W and ∠Z are supplementary

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2 years ago

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PLZ HELP IM KINDA STUCK

ozzi

Answer: First on is X=5

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2 years ago

Which expression has an equivalent value to x2 + 9x + 8 for all values of x?

Ann [662]

Answer:

(x + 1)(x + 8)

Step-by-step explanation:

x(x + 8) + 1(x + 8)

x2 + 8x + 1x + 8

x2 + 9x + 8

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2 years ago

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