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3 years ago

If a sunspot has a temperature of 3900 K and the photosphere of the Sun has a temperature of 5760 K, how many times

Mathematics

1 answer:

iren2701 [21]3 years ago

4 0

Answer:

Step-by-step explanation:

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A fair coin is flipped twelve times. What is the probability of the coin landing tails up exactly nine times?

seraphim [82]

Answer:

$P\left(E\right)=\frac{55}{1024}$

Step-by-step explanation:

Given that a fair coin is flipped twelve times.

It means the number of possible sequences of heads and tails would be:

2¹² = 4096

We can determine the number of ways that such a sequence could contain exactly 9 tails is the number of ways of choosing 9 out of 12, using the formula

$nCr=\frac{n!}{r!\left(n-r\right)!}$

Plug in n = 12 and r = 9

$=\frac{12!}{9!\left(12-9\right)!}$

$=\frac{12!}{9!\cdot \:3!}$

$=\frac{12\cdot \:11\cdot \:10}{3!}$ ∵ $\frac{12!}{9!}=12\cdot \:11\cdot \:10$

$=\frac{1320}{6}$ ∵ $3!\:=\:3\times 2\times 1=6$

$=220$

Thus, the probability will be:

$P\left(E\right)=\frac{n\left(E\right)}{n\left(S\right)}$

$=\frac{220}{4096}$

$=\frac{55}{1024}$

Thus, the probability of the coin landing tails up exactly nine times will be:

$P\left(E\right)=\frac{55}{1024}$

4 0

3 years ago

Evaluate the expression.<br><br> -2 + 49 divided (-7)

Ann [662]

Answer:

-9

Step-by-step explanation:

+49/-7=-7

-2-7=-9

3 0

3 years ago

PLEASE HELP URGENT!!!!

Dovator [93]

Answer:

£ 21552.13

Step-by-step explanation:

P= £18790

r =4.9% = $\frac{4.9}{100}=0.049$

t = 3 years

I = Prt

I = 18790 * 0.049 * 3

=£ 2762.13

After 3 years , the amount in Dan's account = 18790 + 2762.13

= £ 21552.13

7 0

3 years ago

What two numbers multiply to -36 and add up to -9

Softa [21]

Answer:

-12,3

Step-by-step explanation:

-12×3=-36

-12+3=-9

3 0

3 years ago

Today Alice is five times as old as Todd in 10 years she will only be 3 times as old what is there age now

Ugo [173]

Answer:

Step-by-step explanation:

3 0

3 years ago