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Marianna [84]
3 years ago
14

Homer is giving some cookies to each of

Mathematics
1 answer:
Stells [14]3 years ago
3 0

Answer:

7 cookies

Step-by-step explanation:

We have 3 brothers

First , Second, Third

Let the total number cookies be represented by A

1 cookie = 1

Working backwards, we start from the third brother

If we work backwards

It means he gave everything away

We start from the youngest

He was given 1/2 of what was left and 1/2 a cookie

This means,

1/2 + 1/2 = 1

The second brother

He got half of what is left and 1/2 a cookies

Half of what is left from brother

= What the youngest brother got + 1/2 + 1/2 a cookie

= 1 + 1/2 + 1/2

= 1.5 + 1/2

= 2 cookies

For the first brother

He got 1/2 of the cookies + 1/2 cookie

= 1.5 × 2 + 1/2 + 1/2 cookies

= 3 1/2 + 1/2

= 4 cookies

The first brother got 4 cookies

The second brother got 2 cookies

The third broth got 1 cookies

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Let X, the number of flaws on the surface of a randomly selected boiler of a certain type, have a Poisson distribution with para
kvasek [131]

Answer:

(a) 0.932

(b) 0.0653

(c) 0.032

(d) 0.316

(e) 0.251

Step-by-step explanation:

From the table with mean parameter μ = 5, we can compute the following cumulative and density probability

(a) P(X \leq 8) = 0.932 (cumulative)

(b) P(X = 8) = 0.0653 (density)

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(e) P(5 < X < 8) = P(X \leq 8) - P(X \leq 5) - P(X = 8) = 0.932 - 0.616 - 0.0653 = 0.251

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3 years ago
The shape of the distribution of the time required to get an oil change at a 15-minute oil-change facility is unknown. However,
kolezko [41]

Answer:

(a) 0.0128 to 4 decimal places

(b) The 90% confidence interval is 119.1 < μ < 121.0 to 1 decimal places

Step-by-step explanation:

See the attached documents and graphs. Cheers!

Download pdf
<span class="sg-text sg-text--link sg-text--bold sg-text--link-disabled sg-text--blue-dark"> pdf </span>
4de97e6d942fe2c9047a396b82fccba0.png
0b940014a3beda8e854506c0084127b3.png
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Write as a fraction in simplest form.
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Answer:

2/4=1/2

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2 years ago
The price of a four-year dinner was $100 two decades ago. A report says that a dinner is 250% of what it was 20 years ago, how m
Leviafan [203]

The original price of a shirt was $20. It was decreased to $15 . What is the percent decrease of the price of this shirt.


Solution to Problem 1:


The absolute decrease is


20 - 15 = $5


The percent decrease is the absolute decrease divided by the the original price (part/whole).


percent decease = 5 / 20 = 0.25


Multiply and divide 0.25 to obtain percent.


percent decease = 0.25 = 0.25 * 100 / 100 = 25 / 100 = 25%


Problem 2:


Mary has a monthly salary of $1200. She spends $280 per month on food. What percent of her monthly salary does she spend on food?


Solution to Problem 2:


The part of her salary that is spent on food is $280 out of her monthly salary of $1200


percent = part / whole = 280 / 1200 = 0.23 (rounded to 2 decimal places)


Multiply and divide 0.23 by 100 to convert in percent


percent = 0.23 * 100 / 100 = 23 / 100 = 23%


Problem 3:


The price of a pair of trousers was decreased by 22% to $30. What was the original price of the trousers?


Solution to Problem 3:


Let x be the original price and y be the absolute decrease. If the price was decreased to $30, then


x - y = 30


y is given by


y = 22% of x = (22 / 100) * x = 0.22 x


Substitute y by 0.22 x in the equation x - y = 30 and solve for x which the original price.


x - 0.22 x = 30


0.78 x = 30


x = $38.5


Check the solution to this problem by reducing the origonal price found $38.5 by 22% and see if it gives $30.


Problem 4:


The price of an item changed from $120 to $100. Then later the price decreased again from $100 to $80. Which of the two decreases was larger in percentage term?


Solution to Problem 4:


First decrease in percent


part / whole = (120 - 100) / 120 = 0.17 = 17%


Second decrease in percent


part / whole = (100 - 80) / 100 = 0.20 = 20%

gave number of questions

same conccepttttt

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