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3 years ago

What is a Ratio ??????

Mathematics

2 answers:

vfiekz [6]3 years ago

6 0

It's easy to look it up in your phone

777dan777 [17]3 years ago

6 0

Noun
the quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
"the ratio of men's jobs to women's is 8 to 1"
synonyms: proportion, comparative number, correlation, relationship, correspondence; More
the relative value of silver and gold in a bimetallic system of currency.

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A man and a woman agree to meet at a cafe about noon. If the man arrives at a time uniformly distributed between 11:40 and 12:10

kompoz [17]

Answer:

0.3888

Step-by-step explanation:

To solve the exercise we need a neutral time, so we define at 12:00 as time 0.

If the man arrives in a uniformly distributed time between 11:40 and 12:10, the time is distributed from -20 to 10.

If the woman arrives in a time evenly distributed between 11:45 and 12:20, the time is distributed from -15 to 20.

Assuming that each one arrives at 12: X and 12: Y for men and women, then the space of our time is defined as

Man [-20,10]

Woman [-15,20]

So,

$f_x(x)=\frac{1}{10-(-20)}=\frac{1}{30}\\f_y(y)=\frac{1}{20-(-15)}=\frac{1}{35}$

Then,

$f_{xy}(x,y)=f_x(x)f_y(y)=\frac{1}{30} \frac{1}{35} = \frac{1}{1050}$

The probability of finding an arrival less than 5 minutes is

$P(|X-Y|\leq 5) = \int\limit^20_{-15} \int\limit^{x+5}_{x-5} f(x,y)dydx$

$P(|X-Y|\leq 5)= \frac{1}{1050}\int\limit^{20}_{-15} y|^{x+5}_{x-5}dx$

$P(|X-Y|\leq 5)= \frac{35*10}{900}=0.3888$

6 0

3 years ago

The product of the first three terms of a geometric progression is 3375, and their sum is 65. Find the first term of this progre

artcher [175]

Answer:

5 or 45

Step-by-step explanation:

If the first term is "a" and the common ratio is "r", then the first three terms are ...

a, ar, ar²

Their product will be ...

a × ar × ar² = (ar)³ = 3375

ar = ∛3375 = 15

Their sum will be ...

a + ar + ar² = 65 = 15/r + 15 + 15r

Subtracting 15 and multiplying by r/5, we have the quadratic in r:

10r = 3 + 3r²

3r² -10r +3 = 0 . . . . in standard form

(3r -1)(r -3) = 0 . . . . factored

r = 1/3 . . or . . 3 . . . . values of r that make the factors zero

The first term is 15/r = 45 or 5

_____

The first three terms could be 5, 15, 45; or they could be 45, 15, 5.

5 0

3 years ago

During a phone call, Beyunka was told of the most recent transactions in her company's business account. There were deposits of

Norma-Jean [14]

Answer:

The amount of change in the balance of the account is an increase of $3160.57.

Step-by-step explanation:

i) first deposit is given as $1250

ii) second deposit is given as $3040.57

iii) first withdrawal is given as $400

iv) second withdrawal is given as $400

v) third withdrawal is given as $400

vi) first penalty removed is $35

vii) second penalty removed is $35

viii) therefore the change to the balance is given by

$1250 + $3040.57 - $400 - $400 - $400 + $35 + $35 = $3160.57

viii) Therefore the amount of change in the balance of the account is an increase of $3160.57.

4 0

3 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME :)

Arada [10]

<h3>Answer: 2x/15</h3>

T = total amount of money = (14x^2)/15

y = amount of money each person receives

n = number of people

y*n = T

y*7x = (14x^2)/15

y = (1/(7x))*(14x^2)/15 .... multiply both sides by 1/(7x)

y = 2x/15

5 0

4 years ago

25% of Mr. Foster's class chose an amber background for their school picture. If 6 students chose an amber background, how many

Lelu [443]

Answer:

<h2>24 students</h2>

Step-by-step explanation:

25% of a hundred is one-fourth and because there are six students in a fourth of the whole we are multiplying four and six. 6x 4 is 24.

5 0

3 years ago