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il63 [147K]
2 years ago
15

The water level In a plastic pool changed by the -8 gallons each hour due to a small hole in the bottom after 6 hours the pool c

ontained 132 gallons how much water was in the pool originally
Mathematics
1 answer:
vlada-n [284]2 years ago
5 0

Answer:

180 gallons

Step-by-step explanation:

Each hour, 8 gallons were lost. Thus, in 6 hours,

6 * 8 = 48 gallons were lost

After 6 hours, 132 gallons remained, so before this 6 hours, there were more 48 gallons in it. Thus,

Original amount was 132 + 48 = 180 gallons

Originally, 180 gallons of water was in the pool

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To solve this problem, we make use of the z statistic. What we have to do here is to find for the z score using the given data and from the standard probability tables for z, we locate the proportion of the fish longer than 12 inches.

 

The formula for calculating the z score is:

z = (x – μ) / σ

where,

x = the sample value = 12 inches

μ = the sample mean = 11 inches

σ = 2 inches

 

so,

z = (12 – 11) / 2

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z = 0.5

 

Since we are looking for the values greater than 12, so this is a right tailed test. Using the tables, the value of p at this value of z is:

p (z = 0.5) = 0.3085

 

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3 0
3 years ago
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3 years ago
Sally begins hiking at an elevation of 224 feet. Then, she descends 131 feet and climbs 67 feet higher than her current position
Deffense [45]

Answer:

-3

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The numerical addition expression is

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We simplify this to obtain:

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5 0
3 years ago
Someone help me and explain . this is confusing.
pentagon [3]

Answer:

on the image

Step-by-step explanation:

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7 0
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Read 2 more answers
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Answer:

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Step-by-step explanation:

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hope this makes sense;)

5 0
2 years ago
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