All categories

3 years ago

Flip a coin 4 times and calculate the experimental probability of the coin landing heads up.

Mathematics

2 answers:

Reika [66]3 years ago

5 0

Answer:

Am going to say 50%

Step-by-step explanation:

Because you flip the coin four times so it could land on heads 2 times or tails 2 times.

Shkiper50 [21]3 years ago

4 0

Answer:

the fisrt is 3/4 th second is 5/8

Step-by-step explanation:

You might be interested in

A phone has 5/8 of its battery charge left. If the battery loses 3/8 of its full charge every hour, how many hours will the batt

Marianna [84]

Answer:

An hour and 45 minutes

3 0

2 years ago

Soo like anybody up still?<br> orrrr..

kakasveta [241]

Answer:

yes we chilling hbu gee

6 0

2 years ago

Read 2 more answers

Two lines and a point are guaranteed to be complainer if

Alexxandr [17]

I am here wondering watin dey do now aa

7 0

3 years ago

You have a wire that is 20 cm long. You wish to cut it into two pieces. One piece will be bent into the shape of a square. The o

Aleksandr [31]

Answer:

Therefore the circumference of the circle is $=\frac{20\pi}{4+\pi}$

Step-by-step explanation:

Let the side of the square be s

and the radius of the circle be r

The perimeter of the square is = 4s

The circumference of the circle is =2πr

Given that the length of the wire is 20 cm.

According to the problem,

4s + 2πr =20

⇒2s+πr =10

$\Rightarrow s=\frac{10-\pi r}{2}$

The area of the circle is = πr²

The area of the square is = s²

A represent the total area of the square and circle.

A=πr²+s²

Putting the value of s

$A=\pi r^2+ (\frac{10-\pi r}{2})^2$

$\Rightarrow A= \pi r^2+(\frac{10}{2})^2-2.\frac{10}{2}.\frac{\pi r}{2}+ (\frac{\pi r}{2})^2$

$\Rightarrow A=\pi r^2 +25-5 \pi r +\frac{\pi^2r^2}{4}$

$\Rightarrow A=\pi r^2\frac{4+\pi}{4} -5\pi r +25$

For maximum or minimum $\frac{dA}{dr}=0$

Differentiating with respect to r

$\frac{dA}{dr}= \frac{2\pi r(4+\pi)}{4} -5\pi$

Again differentiating with respect to r

$\frac{d^2A}{dr^2}=\frac{2\pi (4+\pi)}{4}$ > 0

For maximum or minimum

$\frac{dA}{dr}=0$

$\Rightarrow \frac{2\pi r(4+\pi)}{4} -5\pi=0$

$\Rightarrow r = \frac{10\pi }{\pi(4+\pi)}$

$\Rightarrow r=\frac{10}{4+\pi}$

$\frac{d^2A}{dr^2}|_{ r=\frac{10}{4+\pi}}=\frac{2\pi (4+\pi)}{4}>0$

Therefore at $r=\frac{10}{4+\pi}$ , A is minimum.

Therefore the circumference of the circle is

$=2 \pi \frac{10}{4+\pi}$

$=\frac{20\pi}{4+\pi}$

4 0

2 years ago

So teacher asked her to find 42.6÷10 to the second power how many places in what direction should sue move the decimal point to

ki77a [65]

move the decimal point 2 places to the left

42.6 / $10^{2}$ = 0.426

4 0

2 years ago