3 years ago

At which times could rory phone have been plugged into the charger?select three options

Mathematics

1 answer:

bezimeni [28]3 years ago

4 0

Answer:

Step-by-step explanation:

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What is the probability of flipping a coin 10 times and getting tails 7 times ? Round your answer to the nearest tenth of a perc

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Answer:

Option C: 11.7%

Step-by-step explanation:

The number of elements in sample space when a coin is flipped 10 times will be:

$n(S) = 2^{10} \\= 1024$

Let A be the event that the tails appear 7 times:

Then,

$C_{(n,k)}=\frac{n!}{(k!)(n-k)!} \\where\\n=population\\k=picks\\In our case, k =7\\and\\n=10\\C_{(10,7)}= \frac{10!}{(7!)(10-3)!}\\= 120\\So, \\P(A) = \frac{n(A)}{n(S)} \\P(A) = \frac{120}{1024} \\= 0.1171\\$

Converting into percentage:

$P(A) = 0.1171*100=11.7%$

So, option C is correct ..

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3 years ago

Find the percent of the number 60% of 20

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Step-by-step explanation:

60% of 20 = 12

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asambeis [7]

B is the right answer.

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3 years ago

To express the polynomial d^2+d^3-d+3 in standard form, which term should be written first?

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When you want to write a polynomial, you should write the term with the highest degree first.
Here, it should go like this: d^3 + d^2 - d + 3
This means that the term which should be written first is the cubic term.

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31.75 as an improper fraction is 127/4. The mixed number fraction is 31 3/4.

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