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tresset_1 [31]
3 years ago
5

A single ball is taken at random from an urn containing 10 balls numbered 1 through 10. what is the probability of obtaining a b

all whose number is less than 7?
Mathematics
1 answer:
kotykmax [81]3 years ago
7 0

To find probability you can use proportions

What i would do is 6/10 since it cant be 7 and then cross multiply it by 1/10.

This should get you 60%

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Is 100 MG less than 10g
pantera1 [17]
There are 1000 grams in a gram  and 1000 times 10 is 10000 so yes 100 mg is less than a 10g
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stich3 [128]

Answer:

C.

Step-by-step explanation:

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3 years ago
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
Nancy and two friend paid a 15% tip for a restaurant bill of $51. Then
RoseWind [281]

Answer:

they payed 3.825 each

Step-by-step explanation:

15% of 51 is 7.65 so you divide that by two and get 3.825

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Please help me......
irina [24]
Hope it helped ............

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