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diamong [38]
3 years ago
5

Help!! Will mark brainliest

Mathematics
2 answers:
valina [46]3 years ago
7 0

Answer:

is it not also 43

Step-by-step explanation:

devlian [24]3 years ago
3 0

Answer:

43

Step-by-step explanation:

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Recall that m(t) = (1/2)^t/h for radioactive decay, where h is the half-life. Suppose that a 500g sample of phosphorus-32 decays
katrin2010 [14]

The question is incomplete, here is the complete question:

Recall that m(t) = m.(1/2)^t/h for radioactive decay, where h is the half-life. Suppose that a 500 g sample of phosphorus-32 decays to 356 g over 7 days. Calculate the half life of the sample.

<u>Answer:</u> The half life of the sample of phosphorus-32 is 14.28days^{-1}

<u>Step-by-step explanation:</u>

The equation used to calculate the half life of the sample is given as:

m(t)=m_o(1/2)^{t/h}

where,

m(t) =  amount of sample after time 't' = 356 g

m_o = initial amount of the sample = 500 g

t = time period = 7 days

h = half life of the sample = ?

Putting values in above equation, we get:

356=500\times (\frac{1}{2})^{7/h}\\\\h=14.28days^{-1}

Hence, the half life of the sample of phosphorus-32 is 14.28days^{-1}

7 0
3 years ago
What sets does the fraction -4/9 belong to?
atroni [7]
Real number, rational number
6 0
3 years ago
Please help me if u don’t I will get a bad grade‼️
m_a_m_a [10]

Given:

The equation is

\dfrac{1}{3}x=\dfrac{1}{5}

To find:

The coefficient and reciprocal.

Solution:

We have,

\dfrac{1}{3}x=\dfrac{1}{5}

Here, \dfrac{1}{3} is multiplied with x.

So, the coefficient of x is \dfrac{1}{3}.

To find the reciprocal, we need to interchange numerator and denominator of a fraction.

So, the reciprocal of \dfrac{1}{3} is \dfrac{3}{1}=3

Therefore, the reciprocal is 3.

4 0
3 years ago
Any one that knows this please help thanks!
yulyashka [42]

Replace the x with 9, and the y with 1.

(x · y²)/-5 becomes (9 · 1²)/-5

1² is just 1, so you're doing 9 × 1 (which is = 9) over -5.

Therefore, your final answer is -9/5.

4 0
3 years ago
33/10 divided by 11/7
jek_recluse [69]

Answer:

21/10 or 2.1

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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