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2 years ago

Here are the temperatures of a glass of warm water after it's put in a freezer please help

Mathematics

1 answer:

zavuch27 [327]2 years ago

7 0

Answer:

C(t)= 80 · (0.9)^t

Step-by-step explanation: Its the correct one on khan academy

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You flip an unfairly weighted coin 4 times. If the probability of getting a tail is 0. 38.

anygoal [31]

Answer:

0.84306608

Step-by-step explanation:

The probability of an event, e, occurring exactly r times over n trials follows the formula

(n combination r) * p^r * q ^ (n-r)

with p being the probability the event will occur and q being the probability the event will not occur.

I assume you have a calculator/can find one online that can do combinations.

Here, we want to figure out if you get:

- 0 tails

- 1 tail

- 2 tails

If you get 3 or 4 tails, we are getting more than the 2 tails desired

For 0 tails:

- p is the probability a tail will occur = 0.38

- we want it to occur 0 times, so r = 0

- q is (1-p) = 1- 0.38 = 0.62

- we have 4 trials, as we flip it 4 times

(n combination r) * p^r * q ^ (n-r) = (4 combination 0) * (0.38) ^0 * (0.62) ^(4-0) = 1 * (0.38) ^0 * (0.62) ^(4-0) = 0.14776336

For 1 tail:

- p = 0.38, q = 0.62 as with 0 tails

- r = 1, n = 4

(n combination r) * p^r * q ^ (n-r) = (4 combination 1) * (0.38) ^1 * (0.62) ^(4-1) = 4* (0.38) ^1 * (0.62) ^(4-1) = 0.36225856

For 2 tails:

- p = 0.38, q = 0.62 as with 0 tails

- r = 2, n = 4

(n combination r) * p^r * q ^ (n-r) = (4 combination 2) * (0.38) ^1 * (0.62) ^(4-2) = 6* (0.38) ^2 * (0.62) ^(4-2) = 0.33304416

add our 3 probabilities together

0.33304416 + 0.36225856 + 0.14776336 = 0.84306608 as our answer

8 0

2 years ago

The set of all whole numbers not greater than 5

k0ka [10]

Answer:

-5, -4 , -3 , -2, -1, 1, 2 , 3, 4, 5

Step-by-step explanation:

6 0

3 years ago

Solve for x and y.<br> y = 2/3x - 2<br> y = -x + 3

sesenic [268]

Answer:

1. x= 3y+6/2

y=2/3x-2

2.x=−y+3

y=−x+3

Step-by-step explanation:

1. Let's solve for x.

y=2/3x-2

Step 1: Flip the equation.

2/3x-2=y

Step 2: Add 2 to both sides.

2/3x-2+2=y+2

2/3x=y+2

Step 3: Divide both sides by 2/3.

2/3x/2/3=y+2/2/3

x= 3y+6/2

Let's solve for y.

y=2/3x-2

2. Let's solve for x.

y=−x+3

Step 1: Flip the equation.

−x+3=y

Step 2: Add -3 to both sides.

−x+3+−3=y+−3

−x=y−3

Step 3: Divide both sides by -1.

-x/-1=y-3/-1

x=−y+3

Let's solve for y.

y=−x+3

here are two graphs if you need a better explanation

HOPE THIS HELPS

5 0

3 years ago

Plz help due tomorrow

Lostsunrise [7]

Answer:

6(10)+5x=180

Step-by-step explanation:

The grocery store received a crate of 180 pound...

So, the whole amount is 180..

The crate contains six 10 pound bag of potato plus an unknown number of 5pound bag of potato....

So if we think, that the unknown number is x the equation would be

6(10)+5x=180

Hope ya find this helpful..

6 0

3 years ago

Can someone please answer. There is one problem. There's a picture. Thank you!

lesya [120]

Hello,

False y∈[-1,1]

5 0

3 years ago