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goblinko [34]
3 years ago
11

There are three children in a family. a friend is told that at least two of them are boys. what is the probability that all thre

e are boys? the friend is then told that the two are the oldest two children. now what is the probability that all three are boys? use bayes law to explain this. assume throughout that each child is independently either a boy or a girl with equal probability.
Mathematics
1 answer:
Nostrana [21]3 years ago
7 0
It would be 33.333333% Likely to be a boy or a girl.
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One hundred grams of radium are stored in a container. The amount RR (in grams) of radium present after tt years can be modeled
drek231 [11]

Answer:

6967 years

Step-by-step explanation:

Given the exponential function :

R=100e−0.00043t

Time = t in years

R = final amount

Number of years in which only 5 grams of radium will be present :

R = 5

Plugging into our formula :

5 = 100 * e^−0.00043t

5 / 100 = e^−0.00043t

0.05 = e^−0.00043t

Take the In of both sides

−2.995732 = - 0.00043t

t = −2.995732 / - 0.00043t

t = 6966.819

t = 6966.819 years

t = about 6967 years

8 0
3 years ago
Leah has sold magazine subscriptions worth $330 for a school fundraiser. If she reaches a total of $500, she wins a gift certifi
insens350 [35]
You can solve by subtracting: 500-330

but I like to use mental math and think this way:
she has 330
70 more will give her 400
and 100 more will give her 500
100 + 70 is 170.
7 0
4 years ago
A student says that the​ x-intercept of a line is ​(0,-10,​). Is the student​ correct? Explain.
nataly862011 [7]

Answer:

Yes, the student is correct

Step-by-step explanation:

Given

(0,-10)

Required

Does it represent the x intercept

At the x intercept, the value of x is 0.

So, the function (x,y) becomes (0,y)

(0,-10) can be compared to (0,y)

Hence, the student is correct

5 0
2 years ago
-Find the y-intercept of the line with the equation 2x+y=5.
AlekseyPX

Answer:

E.  5

Step-by-step explanation:

Let's rewrite the equation in the form of y=mx+b, where m is the slope and b is the y-intercept (the value of y when x = 0).

2x + y = 5

y = -2x+5

M, the slope, is -2

<u>5, b, is the y-intercept</u>

See attached graph.

8 0
2 years ago
What is the ph of 0.1M HNO3
11111nata11111 [884]

Answer:

i hope this helps

Step-by-step explanation:

the pH of the solution is 5.74.

5 0
3 years ago
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