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I am Lyosha [343]

3 years ago

9

On a Saturday the ratio of the amount of water used by Household A to the amount of water used by Household B was 13:5.Household

A used 260 gallons of water for that day.find the total amount of water used by the two household on that Saturday

1 answer:

Reptile [31]3 years ago

7 0

Use a proportion.

Let A = water used in household A.
Let B = water used in household B.

A to B = 13 to 5

A = 260 gal

260 to B = 13 to 5

260/B = 13/5

13B = 5 * 260

B = 100

A + B = 260 + 100 = 360

The total is 360 gallons.

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Answer:

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5 - number summary :

Minimum = 15.2

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Standard deviation, s = 4.068

Step-by-step explanation:

Given the data:

X : 15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

Ordered data:

15.2, 18.8, 19.3, 19.7, 20.2, 21.8, 22.1, 29.4

The mean (xbar) :

Xbar = Σx / n ; n = sample size = 8

Xbar = 166.8 / 8 = 20.8125

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(4 + 5)th term / 2

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The five number summary :

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(18.8 + 19.3) / 2 = 19.05

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The standard deviation, s = sqrt[(x - xbar)²/ (n-1)]

Using calculator ;

s = 4.068

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