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3 years ago

10

Find the probability of 2 heads when flipping 3 coins

2 answers:

Olegator [25]3 years ago

7 0

2/6 is the answer 1/2 1/2 0/2

kkurt [141]3 years ago

3 0

Hello there,

So there are three coins and you have 50 50 chance of getting heads or tails

There are 8 possible outcomes. HHH, HHT, HTT, HTH, THH, THT, TTH, TTT

So concluding that statement there is a 3/8 chance of getting 2 heads while flipping 3 coins.

Hope this helps you!

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To swing. Here, ttt is entered in radians. P(t) = -5\cos\left(2\pi t\right) + 5P(t)=−5cos(2πt)+5P, left parenthesis, t, right pa

Lelechka [254]

Answer:

0.20 seconds

Step-by-step explanation:

Given the function:

For the distance traveled by a pendulum in time $t$ :

$P(t)=-5cos(2\pi t)+5$

Where $t$ is in radians.

Also, given that $P(t)=3.5\ cm$

To find:

The time $t$ = ? to the nearest hundredth.

<em>Solution:</em>

Putting the values as per given statements, it can be observed that:

$3.5=-5cos(2\pi t)+5\\\Rightarrow -1.5=-5cos(2\pi t)\\\Rightarrow 0.3=cos(2\pi t)$

Taking the inverse:

$cos^{-1}(0.3) = 2\pi t$

$\Rightarrow 2\pi t=72.54^\circ$

We know that $2\pi\ radians = 360^\circ$

Putting the value above:

$\Rightarrow 360t=72.54^\circ\\\Rightarrow t = \dfrac{72.54}{360}\\\Rightarrow t =\bold{0.20}\ seconds$

So, after 0.20 seconds, the pendulum reaches 3.5 cm from the place it was released.

3 0

3 years ago

What mass of solid that has a molar mass of 89.0 g/mol should be added to 100.0 g of benzene to raise the boiling point of benze

KATRIN_1 [288]

The required mass of the solid is 8.52g. Hence option B is correct.

We have,
mb = mass/89.0, ΔTb = 2.42° C and Kb = 2.53°C•kg/mol.

<h3>What is mass?</h3>

Mass of the object is defined as the space occupied by an object.

Given equation, ΔTb=Kb x mb
2.42 = 2.53 x mb
mb =0.95
mass / 89.0 x 0.1 = 0.95
mass = 8.52 g

Thus, the required mass of the solid is 8.52g.

learn more about mass here:
brainly.com/question/19694949

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2 years ago

There are 576 heartbeats on 32 seconds the unite rate is...... heartbeats per second

ohaa [14]

Answer:

18

Step-by-step explanation:

I know this bc, if you divide the heart beats by the seconds you get the answer.

576/32=18

Hope this helps:)

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OverLord2011 [107]

It is 7.7 because u need to round it to the neares but not everytime;)
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Probability out of 125 babies 60 will be boys

tangare [24]

60/125 or 12/25 is the answer reduced or 48% chance.

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