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Aliun [14]
2 years ago
5

A jar contains 0.25 liter of apple juice and 0.30 liter of grape juice. Melissa poured 0.75 liter of pineapple juice into the ja

r. She then drank 0.20 liter of the mixture. Part A: Write an expression to represent the total amount of juice left in the jar. (5 points) Part B: Simplify the expression and identify which property is used in each step. (5 points)​
Mathematics
1 answer:
Lynna [10]2 years ago
4 0

Answer: Part A: 1.10 liter

Total amount of juice left = 0.25 + 0.30 + 0.75 - 0.20

Step-by-step explanation:

(original amount of juice + added juice) - juice that was drank = juice left in the jar

(0.25 + 0.30 + 0.75) - 0.20 =

1.30 - 0.20 =

1.10 left in jar

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Answer:

B) 2.849

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Given: 2.85 which is rounded to the nearest hundredth place.

To find the number, the thousandth place must be greater than or equal to 5.

Here 2.849 has the thousandth place greater than 5

When we round off 2.849 to the nearest hundredth place, we get

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Hope this will helpful.

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d)at least 151 sample is needed for 95% probability that sample mean falls within 8$ of the population mean.

Step-by-step explanation:

Let z(p) be the z-statistic of the probability that the mean price for a sample is within the margin of error. Then

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by looking z-table corresponding p value is 1-0.3808=0.6192

b.

z(p)=\frac{8*\sqrt{50}}{50 } ≈ 1.1314

by looking z-table corresponding p value is 1-0.2578=0.7422

c.

z(p)=\frac{8*\sqrt{100}}{50 } ≈ 1.6

by looking z-table corresponding p value is 1-0.1096=0.8904

d.

Minimum required sample size for 0.95 probability is

N≥(\frac{z*s}{ME} )^2 where

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then N≥(\frac{1.96*50}{8} )^2 ≈150.6

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