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lord [1]
3 years ago
5

M mr. Brown has $410,000 in a retirement account that earns 3.85% interest each year. Find the amount earned each year by his in

vestment. How do you do this I don't understand?
Mathematics
1 answer:
Maslowich3 years ago
4 0
Ok you first turn percent into a decimal so 3.85 would become .0385 then you multiply 410,000 by .0385 and add your awnser to 410,000 to have your final awnser witch is 425,785
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inysia [295]
450*(2/5)


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3 0
2 years ago
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If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?
andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: \frac{35}{128}

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

^nC_k=\frac{n!}{k!(n-k)!}

in our given question, n= 7, k= 4

Putting values:

^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: \frac{35}{128}

Keywords: Probability

Learn more about Probability at:

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7 0
3 years ago
A raindrops has a mass of 0.50g. how many moles of water does a raindrop contain
alina1380 [7]
So, here you have to look at the periodic table and see what the molar mass of each molecule composing the water compound H_2 O
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That said, looking at the mass, we have to ask ourselves, if a mol of water contains 18g of mass, how many moles do we have in 0.5g of water? 
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Anastaziya [24]

9514 1404 393

Answer:

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Step-by-step explanation:

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Use a half-angle identity to find the exact value of sin pi/8

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